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/* |
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* libeio implementation |
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* |
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* Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de> |
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* All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without modifica- |
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* tion, are permitted provided that the following conditions are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright notice, |
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* this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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* CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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* CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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* ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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* OF THE POSSIBILITY OF SUCH DAMAGE. |
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* |
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* Alternatively, the contents of this file may be used under the terms of |
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* the GNU General Public License ("GPL") version 2 or any later version, |
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* in which case the provisions of the GPL are applicable instead of |
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* the above. If you wish to allow the use of your version of this file |
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* only under the terms of the GPL and not to allow others to use your |
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* version of this file under the BSD license, indicate your decision |
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* by deleting the provisions above and replace them with the notice |
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* and other provisions required by the GPL. If you do not delete the |
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* provisions above, a recipient may use your version of this file under |
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* either the BSD or the GPL. |
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*/ |
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|
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#ifndef _WIN32 |
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# include "config.h" |
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#endif |
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|
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#include "eio.h" |
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#include "ecb.h" |
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|
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#ifdef EIO_STACKSIZE |
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# define XTHREAD_STACKSIZE EIO_STACKSIZE |
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#endif |
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#include "xthread.h" |
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|
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#include <errno.h> |
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#include <stddef.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <errno.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <limits.h> |
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#include <fcntl.h> |
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#include <assert.h> |
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|
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/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */ |
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/* intptr_t only comes from stdint.h, says idiot openbsd coder */ |
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#if HAVE_STDINT_H |
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# include <stdint.h> |
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#endif |
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|
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#ifndef ECANCELED |
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# define ECANCELED EDOM |
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#endif |
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#ifndef ELOOP |
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# define ELOOP EDOM |
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#endif |
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|
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#if !defined(ENOTSOCK) && defined(WSAENOTSOCK) |
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# define ENOTSOCK WSAENOTSOCK |
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#endif |
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|
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static void eio_destroy (eio_req *req); |
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|
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#ifndef EIO_FINISH |
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# define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 |
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#endif |
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|
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#ifndef EIO_DESTROY |
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# define EIO_DESTROY(req) do { if ((req)->destroy) (req)->destroy (req); } while (0) |
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#endif |
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|
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#ifndef EIO_FEED |
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# define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) |
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#endif |
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|
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#ifndef EIO_FD_TO_WIN32_HANDLE |
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# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) |
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#endif |
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#ifndef EIO_WIN32_HANDLE_TO_FD |
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# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) |
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#endif |
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|
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#define EIO_ERRNO(errval,retval) ((errno = errval), retval) |
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|
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#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1) |
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|
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#ifdef _WIN32 |
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|
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#undef PAGESIZE |
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#define PAGESIZE 4096 /* GetSystemInfo? */ |
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|
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#ifdef EIO_STRUCT_STATI64 |
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#define stat(path,buf) _stati64 (path,buf) |
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#define fstat(fd,buf) _fstati64 (fd,buf) |
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#endif |
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#define lstat(path,buf) stat (path,buf) |
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#define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1)) |
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#define mkdir(path,mode) _mkdir (path) |
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#define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1)) |
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|
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#define chmod(path,mode) _chmod (path, mode) |
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#define dup(fd) _dup (fd) |
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#define dup2(fd1,fd2) _dup2 (fd1, fd2) |
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|
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#define fchmod(fd,mode) EIO_ENOSYS () |
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#define chown(path,uid,gid) EIO_ENOSYS () |
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#define fchown(fd,uid,gid) EIO_ENOSYS () |
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#define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */ |
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#define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */ |
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#define mknod(path,mode,dev) EIO_ENOSYS () |
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#define sync() EIO_ENOSYS () |
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#define readlink(path,buf,s) EIO_ENOSYS () |
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#define statvfs(path,buf) EIO_ENOSYS () |
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#define fstatvfs(fd,buf) EIO_ENOSYS () |
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|
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/* we could even stat and see if it exists */ |
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static int |
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symlink (const char *old, const char *neu) |
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{ |
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#if WINVER >= 0x0600 |
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if (CreateSymbolicLink (neu, old, 1)) |
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return 0; |
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|
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if (CreateSymbolicLink (neu, old, 0)) |
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return 0; |
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#endif |
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|
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return EIO_ERRNO (ENOENT, -1); |
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} |
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|
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/* POSIX API only */ |
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#define CreateHardLink(neu,old,flags) 0 |
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#define CreateSymbolicLink(neu,old,flags) 0 |
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|
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struct statvfs |
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{ |
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int dummy; |
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}; |
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|
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#define DT_DIR EIO_DT_DIR |
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#define DT_REG EIO_DT_REG |
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#define D_NAME(entp) entp.cFileName |
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#define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) |
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|
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#else |
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|
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#include <sys/time.h> |
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#include <sys/select.h> |
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#include <sys/statvfs.h> |
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#include <unistd.h> |
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#include <signal.h> |
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#include <dirent.h> |
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|
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#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES |
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#include <sys/mman.h> |
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#endif |
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|
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#define D_NAME(entp) entp->d_name |
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|
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/* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ |
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#if __FreeBSD__ || defined __NetBSD__ || defined __OpenBSD__ |
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#define _DIRENT_HAVE_D_TYPE /* sigh */ |
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#define D_INO(de) (de)->d_fileno |
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#define D_NAMLEN(de) (de)->d_namlen |
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#elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 |
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#define D_INO(de) (de)->d_ino |
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#endif |
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|
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#ifdef _D_EXACT_NAMLEN |
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#undef D_NAMLEN |
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#define D_NAMLEN(de) _D_EXACT_NAMLEN (de) |
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#endif |
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|
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#ifdef _DIRENT_HAVE_D_TYPE |
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#define D_TYPE(de) (de)->d_type |
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#endif |
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|
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#ifndef EIO_STRUCT_DIRENT |
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#define EIO_STRUCT_DIRENT struct dirent |
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#endif |
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|
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#endif |
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|
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#if HAVE_UTIMES |
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# include <utime.h> |
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#endif |
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|
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#if HAVE_SYS_SYSCALL_H |
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# include <sys/syscall.h> |
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#endif |
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|
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#if HAVE_SYS_PRCTL_H |
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# include <sys/prctl.h> |
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#endif |
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|
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#if HAVE_SENDFILE |
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# if __linux |
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# include <sys/sendfile.h> |
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# elif __FreeBSD__ || defined __APPLE__ |
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# include <sys/socket.h> |
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# include <sys/uio.h> |
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# elif __hpux |
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# include <sys/socket.h> |
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# elif __solaris |
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# include <sys/sendfile.h> |
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# else |
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# error sendfile support requested but not available |
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# endif |
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#endif |
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|
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#ifndef D_TYPE |
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# define D_TYPE(de) 0 |
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#endif |
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#ifndef D_INO |
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# define D_INO(de) 0 |
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#endif |
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#ifndef D_NAMLEN |
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# define D_NAMLEN(entp) strlen (D_NAME (entp)) |
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#endif |
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|
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/* used for struct dirent, AIX doesn't provide it */ |
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#ifndef NAME_MAX |
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# define NAME_MAX 4096 |
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#endif |
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|
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/* used for readlink etc. */ |
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#ifndef PATH_MAX |
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# define PATH_MAX 4096 |
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#endif |
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|
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/* buffer size for various temporary buffers */ |
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#define EIO_BUFSIZE 65536 |
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|
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#define dBUF \ |
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char *eio_buf = malloc (EIO_BUFSIZE); \ |
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errno = ENOMEM; \ |
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if (!eio_buf) \ |
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return -1 |
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|
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#define FUBd \ |
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free (eio_buf) |
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|
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#define EIO_TICKS ((1000000 + 1023) >> 10) |
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|
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#define ETP_PRI_MIN EIO_PRI_MIN |
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#define ETP_PRI_MAX EIO_PRI_MAX |
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|
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struct etp_worker; |
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|
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#define ETP_REQ eio_req |
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#define ETP_DESTROY(req) eio_destroy (req) |
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static int eio_finish (eio_req *req); |
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#define ETP_FINISH(req) eio_finish (req) |
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static void eio_execute (struct etp_worker *self, eio_req *req); |
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#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req) |
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|
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/*****************************************************************************/ |
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|
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#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) |
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|
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/* calculate time difference in ~1/EIO_TICKS of a second */ |
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ecb_inline int |
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tvdiff (struct timeval *tv1, struct timeval *tv2) |
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{ |
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return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS |
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+ ((tv2->tv_usec - tv1->tv_usec) >> 10); |
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} |
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|
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static unsigned int started, idle, wanted = 4; |
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|
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static void (*want_poll_cb) (void); |
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static void (*done_poll_cb) (void); |
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|
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static unsigned int max_poll_time; /* reslock */ |
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static unsigned int max_poll_reqs; /* reslock */ |
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|
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static volatile unsigned int nreqs; /* reqlock */ |
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static volatile unsigned int nready; /* reqlock */ |
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static volatile unsigned int npending; /* reqlock */ |
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static volatile unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */ |
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static volatile unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */ |
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|
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static xmutex_t wrklock; |
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static xmutex_t reslock; |
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static xmutex_t reqlock; |
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static xcond_t reqwait; |
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|
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#if !HAVE_PREADWRITE |
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/* |
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* make our pread/pwrite emulation safe against themselves, but not against |
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* normal read/write by using a mutex. slows down execution a lot, |
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* but that's your problem, not mine. |
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*/ |
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static xmutex_t preadwritelock; |
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#endif |
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|
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typedef struct etp_worker |
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{ |
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/* locked by wrklock */ |
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struct etp_worker *prev, *next; |
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|
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xthread_t tid; |
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|
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/* locked by reslock, reqlock or wrklock */ |
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ETP_REQ *req; /* currently processed request */ |
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|
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#ifdef ETP_WORKER_COMMON |
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ETP_WORKER_COMMON |
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#endif |
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} etp_worker; |
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|
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static etp_worker wrk_first; /* NOT etp */ |
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|
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#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock) |
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#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock) |
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|
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/* worker threads management */ |
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|
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static void ecb_cold |
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etp_worker_clear (etp_worker *wrk) |
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{ |
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} |
341 |
|
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static void ecb_cold |
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etp_worker_free (etp_worker *wrk) |
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{ |
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wrk->next->prev = wrk->prev; |
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wrk->prev->next = wrk->next; |
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|
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free (wrk); |
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} |
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|
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static unsigned int |
352 |
etp_nreqs (void) |
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{ |
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int retval; |
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if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
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retval = nreqs; |
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if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
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return retval; |
359 |
} |
360 |
|
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static unsigned int |
362 |
etp_nready (void) |
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{ |
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unsigned int retval; |
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|
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if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
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retval = nready; |
368 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
369 |
|
370 |
return retval; |
371 |
} |
372 |
|
373 |
static unsigned int |
374 |
etp_npending (void) |
375 |
{ |
376 |
unsigned int retval; |
377 |
|
378 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
379 |
retval = npending; |
380 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
381 |
|
382 |
return retval; |
383 |
} |
384 |
|
385 |
static unsigned int |
386 |
etp_nthreads (void) |
387 |
{ |
388 |
unsigned int retval; |
389 |
|
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if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
391 |
retval = started; |
392 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
393 |
|
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return retval; |
395 |
} |
396 |
|
397 |
/* |
398 |
* a somewhat faster data structure might be nice, but |
399 |
* with 8 priorities this actually needs <20 insns |
400 |
* per shift, the most expensive operation. |
401 |
*/ |
402 |
typedef struct { |
403 |
ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */ |
404 |
int size; |
405 |
} etp_reqq; |
406 |
|
407 |
static etp_reqq req_queue; |
408 |
static etp_reqq res_queue; |
409 |
|
410 |
static void ecb_noinline ecb_cold |
411 |
reqq_init (etp_reqq *q) |
412 |
{ |
413 |
int pri; |
414 |
|
415 |
for (pri = 0; pri < ETP_NUM_PRI; ++pri) |
416 |
q->qs[pri] = q->qe[pri] = 0; |
417 |
|
418 |
q->size = 0; |
419 |
} |
420 |
|
421 |
static int ecb_noinline |
422 |
reqq_push (etp_reqq *q, ETP_REQ *req) |
423 |
{ |
424 |
int pri = req->pri; |
425 |
req->next = 0; |
426 |
|
427 |
if (q->qe[pri]) |
428 |
{ |
429 |
q->qe[pri]->next = req; |
430 |
q->qe[pri] = req; |
431 |
} |
432 |
else |
433 |
q->qe[pri] = q->qs[pri] = req; |
434 |
|
435 |
return q->size++; |
436 |
} |
437 |
|
438 |
static ETP_REQ * ecb_noinline |
439 |
reqq_shift (etp_reqq *q) |
440 |
{ |
441 |
int pri; |
442 |
|
443 |
if (!q->size) |
444 |
return 0; |
445 |
|
446 |
--q->size; |
447 |
|
448 |
for (pri = ETP_NUM_PRI; pri--; ) |
449 |
{ |
450 |
eio_req *req = q->qs[pri]; |
451 |
|
452 |
if (req) |
453 |
{ |
454 |
if (!(q->qs[pri] = (eio_req *)req->next)) |
455 |
q->qe[pri] = 0; |
456 |
|
457 |
return req; |
458 |
} |
459 |
} |
460 |
|
461 |
abort (); |
462 |
} |
463 |
|
464 |
static int ecb_cold |
465 |
etp_init (void (*want_poll)(void), void (*done_poll)(void)) |
466 |
{ |
467 |
X_MUTEX_CREATE (wrklock); |
468 |
X_MUTEX_CREATE (reslock); |
469 |
X_MUTEX_CREATE (reqlock); |
470 |
X_COND_CREATE (reqwait); |
471 |
|
472 |
reqq_init (&req_queue); |
473 |
reqq_init (&res_queue); |
474 |
|
475 |
wrk_first.next = |
476 |
wrk_first.prev = &wrk_first; |
477 |
|
478 |
started = 0; |
479 |
idle = 0; |
480 |
nreqs = 0; |
481 |
nready = 0; |
482 |
npending = 0; |
483 |
|
484 |
want_poll_cb = want_poll; |
485 |
done_poll_cb = done_poll; |
486 |
|
487 |
return 0; |
488 |
} |
489 |
|
490 |
X_THREAD_PROC (etp_proc); |
491 |
|
492 |
static void ecb_cold |
493 |
etp_start_thread (void) |
494 |
{ |
495 |
etp_worker *wrk = calloc (1, sizeof (etp_worker)); |
496 |
|
497 |
/*TODO*/ |
498 |
assert (("unable to allocate worker thread data", wrk)); |
499 |
|
500 |
X_LOCK (wrklock); |
501 |
|
502 |
if (thread_create (&wrk->tid, etp_proc, (void *)wrk)) |
503 |
{ |
504 |
wrk->prev = &wrk_first; |
505 |
wrk->next = wrk_first.next; |
506 |
wrk_first.next->prev = wrk; |
507 |
wrk_first.next = wrk; |
508 |
++started; |
509 |
} |
510 |
else |
511 |
free (wrk); |
512 |
|
513 |
X_UNLOCK (wrklock); |
514 |
} |
515 |
|
516 |
static void |
517 |
etp_maybe_start_thread (void) |
518 |
{ |
519 |
if (ecb_expect_true (etp_nthreads () >= wanted)) |
520 |
return; |
521 |
|
522 |
/* todo: maybe use idle here, but might be less exact */ |
523 |
if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())) |
524 |
return; |
525 |
|
526 |
etp_start_thread (); |
527 |
} |
528 |
|
529 |
static void ecb_cold |
530 |
etp_end_thread (void) |
531 |
{ |
532 |
eio_req *req = calloc (1, sizeof (eio_req)); |
533 |
|
534 |
req->type = -1; |
535 |
req->pri = ETP_PRI_MAX - ETP_PRI_MIN; |
536 |
|
537 |
X_LOCK (reqlock); |
538 |
reqq_push (&req_queue, req); |
539 |
X_COND_SIGNAL (reqwait); |
540 |
X_UNLOCK (reqlock); |
541 |
|
542 |
X_LOCK (wrklock); |
543 |
--started; |
544 |
X_UNLOCK (wrklock); |
545 |
} |
546 |
|
547 |
static int |
548 |
etp_poll (void) |
549 |
{ |
550 |
unsigned int maxreqs; |
551 |
unsigned int maxtime; |
552 |
struct timeval tv_start, tv_now; |
553 |
|
554 |
X_LOCK (reslock); |
555 |
maxreqs = max_poll_reqs; |
556 |
maxtime = max_poll_time; |
557 |
X_UNLOCK (reslock); |
558 |
|
559 |
if (maxtime) |
560 |
gettimeofday (&tv_start, 0); |
561 |
|
562 |
for (;;) |
563 |
{ |
564 |
ETP_REQ *req; |
565 |
|
566 |
etp_maybe_start_thread (); |
567 |
|
568 |
X_LOCK (reslock); |
569 |
req = reqq_shift (&res_queue); |
570 |
|
571 |
if (req) |
572 |
{ |
573 |
--npending; |
574 |
|
575 |
if (!res_queue.size && done_poll_cb) |
576 |
done_poll_cb (); |
577 |
} |
578 |
|
579 |
X_UNLOCK (reslock); |
580 |
|
581 |
if (!req) |
582 |
return 0; |
583 |
|
584 |
X_LOCK (reqlock); |
585 |
--nreqs; |
586 |
X_UNLOCK (reqlock); |
587 |
|
588 |
if (ecb_expect_false (req->type == EIO_GROUP && req->size)) |
589 |
{ |
590 |
req->int1 = 1; /* mark request as delayed */ |
591 |
continue; |
592 |
} |
593 |
else |
594 |
{ |
595 |
int res = ETP_FINISH (req); |
596 |
if (ecb_expect_false (res)) |
597 |
return res; |
598 |
} |
599 |
|
600 |
if (ecb_expect_false (maxreqs && !--maxreqs)) |
601 |
break; |
602 |
|
603 |
if (maxtime) |
604 |
{ |
605 |
gettimeofday (&tv_now, 0); |
606 |
|
607 |
if (tvdiff (&tv_start, &tv_now) >= maxtime) |
608 |
break; |
609 |
} |
610 |
} |
611 |
|
612 |
errno = EAGAIN; |
613 |
return -1; |
614 |
} |
615 |
|
616 |
static void |
617 |
etp_cancel (ETP_REQ *req) |
618 |
{ |
619 |
req->cancelled = 1; |
620 |
|
621 |
eio_grp_cancel (req); |
622 |
} |
623 |
|
624 |
static void |
625 |
etp_submit (ETP_REQ *req) |
626 |
{ |
627 |
req->pri -= ETP_PRI_MIN; |
628 |
|
629 |
if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN; |
630 |
if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN; |
631 |
|
632 |
if (ecb_expect_false (req->type == EIO_GROUP)) |
633 |
{ |
634 |
/* I hope this is worth it :/ */ |
635 |
X_LOCK (reqlock); |
636 |
++nreqs; |
637 |
X_UNLOCK (reqlock); |
638 |
|
639 |
X_LOCK (reslock); |
640 |
|
641 |
++npending; |
642 |
|
643 |
if (!reqq_push (&res_queue, req) && want_poll_cb) |
644 |
want_poll_cb (); |
645 |
|
646 |
X_UNLOCK (reslock); |
647 |
} |
648 |
else |
649 |
{ |
650 |
X_LOCK (reqlock); |
651 |
++nreqs; |
652 |
++nready; |
653 |
reqq_push (&req_queue, req); |
654 |
X_COND_SIGNAL (reqwait); |
655 |
X_UNLOCK (reqlock); |
656 |
|
657 |
etp_maybe_start_thread (); |
658 |
} |
659 |
} |
660 |
|
661 |
static void ecb_cold |
662 |
etp_set_max_poll_time (double nseconds) |
663 |
{ |
664 |
if (WORDACCESS_UNSAFE) X_LOCK (reslock); |
665 |
max_poll_time = nseconds * EIO_TICKS; |
666 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); |
667 |
} |
668 |
|
669 |
static void ecb_cold |
670 |
etp_set_max_poll_reqs (unsigned int maxreqs) |
671 |
{ |
672 |
if (WORDACCESS_UNSAFE) X_LOCK (reslock); |
673 |
max_poll_reqs = maxreqs; |
674 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); |
675 |
} |
676 |
|
677 |
static void ecb_cold |
678 |
etp_set_max_idle (unsigned int nthreads) |
679 |
{ |
680 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
681 |
max_idle = nthreads; |
682 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
683 |
} |
684 |
|
685 |
static void ecb_cold |
686 |
etp_set_idle_timeout (unsigned int seconds) |
687 |
{ |
688 |
if (WORDACCESS_UNSAFE) X_LOCK (reqlock); |
689 |
idle_timeout = seconds; |
690 |
if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); |
691 |
} |
692 |
|
693 |
static void ecb_cold |
694 |
etp_set_min_parallel (unsigned int nthreads) |
695 |
{ |
696 |
if (wanted < nthreads) |
697 |
wanted = nthreads; |
698 |
} |
699 |
|
700 |
static void ecb_cold |
701 |
etp_set_max_parallel (unsigned int nthreads) |
702 |
{ |
703 |
if (wanted > nthreads) |
704 |
wanted = nthreads; |
705 |
|
706 |
while (started > wanted) |
707 |
etp_end_thread (); |
708 |
} |
709 |
|
710 |
/*****************************************************************************/ |
711 |
|
712 |
static void |
713 |
grp_try_feed (eio_req *grp) |
714 |
{ |
715 |
while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) |
716 |
{ |
717 |
grp->flags &= ~EIO_FLAG_GROUPADD; |
718 |
|
719 |
EIO_FEED (grp); |
720 |
|
721 |
/* stop if no progress has been made */ |
722 |
if (!(grp->flags & EIO_FLAG_GROUPADD)) |
723 |
{ |
724 |
grp->feed = 0; |
725 |
break; |
726 |
} |
727 |
} |
728 |
} |
729 |
|
730 |
static int |
731 |
grp_dec (eio_req *grp) |
732 |
{ |
733 |
--grp->size; |
734 |
|
735 |
/* call feeder, if applicable */ |
736 |
grp_try_feed (grp); |
737 |
|
738 |
/* finish, if done */ |
739 |
if (!grp->size && grp->int1) |
740 |
return eio_finish (grp); |
741 |
else |
742 |
return 0; |
743 |
} |
744 |
|
745 |
static void |
746 |
eio_destroy (eio_req *req) |
747 |
{ |
748 |
if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); |
749 |
if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); |
750 |
|
751 |
EIO_DESTROY (req); |
752 |
} |
753 |
|
754 |
static int |
755 |
eio_finish (eio_req *req) |
756 |
{ |
757 |
int res = EIO_FINISH (req); |
758 |
|
759 |
if (req->grp) |
760 |
{ |
761 |
int res2; |
762 |
eio_req *grp = req->grp; |
763 |
|
764 |
/* unlink request */ |
765 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
766 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
767 |
|
768 |
if (grp->grp_first == req) |
769 |
grp->grp_first = req->grp_next; |
770 |
|
771 |
res2 = grp_dec (grp); |
772 |
|
773 |
if (!res) |
774 |
res = res2; |
775 |
} |
776 |
|
777 |
eio_destroy (req); |
778 |
|
779 |
return res; |
780 |
} |
781 |
|
782 |
void |
783 |
eio_grp_cancel (eio_req *grp) |
784 |
{ |
785 |
for (grp = grp->grp_first; grp; grp = grp->grp_next) |
786 |
eio_cancel (grp); |
787 |
} |
788 |
|
789 |
void |
790 |
eio_cancel (eio_req *req) |
791 |
{ |
792 |
etp_cancel (req); |
793 |
} |
794 |
|
795 |
void |
796 |
eio_submit (eio_req *req) |
797 |
{ |
798 |
etp_submit (req); |
799 |
} |
800 |
|
801 |
unsigned int |
802 |
eio_nreqs (void) |
803 |
{ |
804 |
return etp_nreqs (); |
805 |
} |
806 |
|
807 |
unsigned int |
808 |
eio_nready (void) |
809 |
{ |
810 |
return etp_nready (); |
811 |
} |
812 |
|
813 |
unsigned int |
814 |
eio_npending (void) |
815 |
{ |
816 |
return etp_npending (); |
817 |
} |
818 |
|
819 |
unsigned int ecb_cold |
820 |
eio_nthreads (void) |
821 |
{ |
822 |
return etp_nthreads (); |
823 |
} |
824 |
|
825 |
void ecb_cold |
826 |
eio_set_max_poll_time (double nseconds) |
827 |
{ |
828 |
etp_set_max_poll_time (nseconds); |
829 |
} |
830 |
|
831 |
void ecb_cold |
832 |
eio_set_max_poll_reqs (unsigned int maxreqs) |
833 |
{ |
834 |
etp_set_max_poll_reqs (maxreqs); |
835 |
} |
836 |
|
837 |
void ecb_cold |
838 |
eio_set_max_idle (unsigned int nthreads) |
839 |
{ |
840 |
etp_set_max_idle (nthreads); |
841 |
} |
842 |
|
843 |
void ecb_cold |
844 |
eio_set_idle_timeout (unsigned int seconds) |
845 |
{ |
846 |
etp_set_idle_timeout (seconds); |
847 |
} |
848 |
|
849 |
void ecb_cold |
850 |
eio_set_min_parallel (unsigned int nthreads) |
851 |
{ |
852 |
etp_set_min_parallel (nthreads); |
853 |
} |
854 |
|
855 |
void ecb_cold |
856 |
eio_set_max_parallel (unsigned int nthreads) |
857 |
{ |
858 |
etp_set_max_parallel (nthreads); |
859 |
} |
860 |
|
861 |
int eio_poll (void) |
862 |
{ |
863 |
return etp_poll (); |
864 |
} |
865 |
|
866 |
/*****************************************************************************/ |
867 |
/* work around various missing functions */ |
868 |
|
869 |
#if !HAVE_PREADWRITE |
870 |
# undef pread |
871 |
# undef pwrite |
872 |
# define pread eio__pread |
873 |
# define pwrite eio__pwrite |
874 |
|
875 |
static eio_ssize_t |
876 |
eio__pread (int fd, void *buf, size_t count, off_t offset) |
877 |
{ |
878 |
eio_ssize_t res; |
879 |
off_t ooffset; |
880 |
|
881 |
X_LOCK (preadwritelock); |
882 |
ooffset = lseek (fd, 0, SEEK_CUR); |
883 |
lseek (fd, offset, SEEK_SET); |
884 |
res = read (fd, buf, count); |
885 |
lseek (fd, ooffset, SEEK_SET); |
886 |
X_UNLOCK (preadwritelock); |
887 |
|
888 |
return res; |
889 |
} |
890 |
|
891 |
static eio_ssize_t |
892 |
eio__pwrite (int fd, void *buf, size_t count, off_t offset) |
893 |
{ |
894 |
eio_ssize_t res; |
895 |
off_t ooffset; |
896 |
|
897 |
X_LOCK (preadwritelock); |
898 |
ooffset = lseek (fd, 0, SEEK_CUR); |
899 |
lseek (fd, offset, SEEK_SET); |
900 |
res = write (fd, buf, count); |
901 |
lseek (fd, ooffset, SEEK_SET); |
902 |
X_UNLOCK (preadwritelock); |
903 |
|
904 |
return res; |
905 |
} |
906 |
#endif |
907 |
|
908 |
#ifndef HAVE_UTIMES |
909 |
|
910 |
# undef utimes |
911 |
# define utimes(path,times) eio__utimes (path, times) |
912 |
|
913 |
static int |
914 |
eio__utimes (const char *filename, const struct timeval times[2]) |
915 |
{ |
916 |
if (times) |
917 |
{ |
918 |
struct utimbuf buf; |
919 |
|
920 |
buf.actime = times[0].tv_sec; |
921 |
buf.modtime = times[1].tv_sec; |
922 |
|
923 |
return utime (filename, &buf); |
924 |
} |
925 |
else |
926 |
return utime (filename, 0); |
927 |
} |
928 |
|
929 |
#endif |
930 |
|
931 |
#ifndef HAVE_FUTIMES |
932 |
|
933 |
# undef futimes |
934 |
# define futimes(fd,times) eio__futimes (fd, times) |
935 |
|
936 |
static int |
937 |
eio__futimes (int fd, const struct timeval tv[2]) |
938 |
{ |
939 |
errno = ENOSYS; |
940 |
return -1; |
941 |
} |
942 |
|
943 |
#endif |
944 |
|
945 |
#if !HAVE_FDATASYNC |
946 |
# undef fdatasync |
947 |
# define fdatasync(fd) fsync (fd) |
948 |
#endif |
949 |
|
950 |
static int |
951 |
eio__syncfs (int fd) |
952 |
{ |
953 |
int res; |
954 |
|
955 |
#if HAVE_SYS_SYNCFS |
956 |
res = (int)syscall (__NR_syncfs, (int)(fd)); |
957 |
#else |
958 |
res = -1; |
959 |
errno = ENOSYS; |
960 |
#endif |
961 |
|
962 |
if (res < 0 && errno == ENOSYS && fd >= 0) |
963 |
sync (); |
964 |
|
965 |
return res; |
966 |
} |
967 |
|
968 |
/* sync_file_range always needs emulation */ |
969 |
static int |
970 |
eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) |
971 |
{ |
972 |
#if HAVE_SYNC_FILE_RANGE |
973 |
int res; |
974 |
|
975 |
if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE |
976 |
|| EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE |
977 |
|| EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER) |
978 |
{ |
979 |
flags = 0 |
980 |
| (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0) |
981 |
| (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0) |
982 |
| (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0); |
983 |
} |
984 |
|
985 |
res = sync_file_range (fd, offset, nbytes, flags); |
986 |
|
987 |
if (!res || errno != ENOSYS) |
988 |
return res; |
989 |
#endif |
990 |
|
991 |
/* even though we could play tricks with the flags, it's better to always |
992 |
* call fdatasync, as that matches the expectation of its users best */ |
993 |
return fdatasync (fd); |
994 |
} |
995 |
|
996 |
static int |
997 |
eio__fallocate (int fd, int mode, off_t offset, size_t len) |
998 |
{ |
999 |
#if HAVE_FALLOCATE |
1000 |
return fallocate (fd, mode, offset, len); |
1001 |
#else |
1002 |
errno = ENOSYS; |
1003 |
return -1; |
1004 |
#endif |
1005 |
} |
1006 |
|
1007 |
#if !HAVE_READAHEAD |
1008 |
# undef readahead |
1009 |
# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) |
1010 |
|
1011 |
static eio_ssize_t |
1012 |
eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) |
1013 |
{ |
1014 |
size_t todo = count; |
1015 |
dBUF; |
1016 |
|
1017 |
while (todo > 0) |
1018 |
{ |
1019 |
size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; |
1020 |
|
1021 |
pread (fd, eio_buf, len, offset); |
1022 |
offset += len; |
1023 |
todo -= len; |
1024 |
} |
1025 |
|
1026 |
FUBd; |
1027 |
|
1028 |
errno = 0; |
1029 |
return count; |
1030 |
} |
1031 |
|
1032 |
#endif |
1033 |
|
1034 |
/* sendfile always needs emulation */ |
1035 |
static eio_ssize_t |
1036 |
eio__sendfile (int ofd, int ifd, off_t offset, size_t count) |
1037 |
{ |
1038 |
eio_ssize_t written = 0; |
1039 |
eio_ssize_t res; |
1040 |
|
1041 |
if (!count) |
1042 |
return 0; |
1043 |
|
1044 |
for (;;) |
1045 |
{ |
1046 |
#ifdef __APPLE__ |
1047 |
# undef HAVE_SENDFILE /* broken, as everything on os x */ |
1048 |
#endif |
1049 |
#if HAVE_SENDFILE |
1050 |
# if __linux |
1051 |
off_t soffset = offset; |
1052 |
res = sendfile (ofd, ifd, &soffset, count); |
1053 |
|
1054 |
# elif __FreeBSD__ |
1055 |
/* |
1056 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
1057 |
* wasted on making it similar to other I/O functions. |
1058 |
*/ |
1059 |
off_t sbytes; |
1060 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
1061 |
|
1062 |
#if 0 /* according to the manpage, this is correct, but broken behaviour */ |
1063 |
/* freebsd' sendfile will return 0 on success */ |
1064 |
/* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ |
1065 |
/* not on e.g. EIO or EPIPE - sounds broken */ |
1066 |
if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) |
1067 |
res = sbytes; |
1068 |
#endif |
1069 |
|
1070 |
/* according to source inspection, this is correct, and useful behaviour */ |
1071 |
if (sbytes) |
1072 |
res = sbytes; |
1073 |
|
1074 |
# elif defined (__APPLE__) |
1075 |
off_t sbytes = count; |
1076 |
res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); |
1077 |
|
1078 |
/* according to the manpage, sbytes is always valid */ |
1079 |
if (sbytes) |
1080 |
res = sbytes; |
1081 |
|
1082 |
# elif __hpux |
1083 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
1084 |
|
1085 |
# elif __solaris |
1086 |
struct sendfilevec vec; |
1087 |
size_t sbytes; |
1088 |
|
1089 |
vec.sfv_fd = ifd; |
1090 |
vec.sfv_flag = 0; |
1091 |
vec.sfv_off = offset; |
1092 |
vec.sfv_len = count; |
1093 |
|
1094 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
1095 |
|
1096 |
if (res < 0 && sbytes) |
1097 |
res = sbytes; |
1098 |
|
1099 |
# endif |
1100 |
|
1101 |
#elif defined (_WIN32) && 0 |
1102 |
/* does not work, just for documentation of what would need to be done */ |
1103 |
/* actually, cannot be done like this, as TransmitFile changes the file offset, */ |
1104 |
/* libeio guarantees that the file offset does not change, and windows */ |
1105 |
/* has no way to get an independent handle to the same file description */ |
1106 |
HANDLE h = TO_SOCKET (ifd); |
1107 |
SetFilePointer (h, offset, 0, FILE_BEGIN); |
1108 |
res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); |
1109 |
|
1110 |
#else |
1111 |
res = -1; |
1112 |
errno = ENOSYS; |
1113 |
#endif |
1114 |
|
1115 |
/* we assume sendfile can copy at least 128mb in one go */ |
1116 |
if (res <= 128 * 1024 * 1024) |
1117 |
{ |
1118 |
if (res > 0) |
1119 |
written += res; |
1120 |
|
1121 |
if (written) |
1122 |
return written; |
1123 |
|
1124 |
break; |
1125 |
} |
1126 |
else |
1127 |
{ |
1128 |
/* if we requested more, then probably the kernel was lazy */ |
1129 |
written += res; |
1130 |
offset += res; |
1131 |
count -= res; |
1132 |
|
1133 |
if (!count) |
1134 |
return written; |
1135 |
} |
1136 |
} |
1137 |
|
1138 |
if (res < 0 |
1139 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
1140 |
/* BSDs */ |
1141 |
#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ |
1142 |
|| errno == ENOTSUP |
1143 |
#endif |
1144 |
#ifdef EOPNOTSUPP /* windows */ |
1145 |
|| errno == EOPNOTSUPP /* BSDs */ |
1146 |
#endif |
1147 |
#if __solaris |
1148 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
1149 |
#endif |
1150 |
) |
1151 |
) |
1152 |
{ |
1153 |
/* emulate sendfile. this is a major pain in the ass */ |
1154 |
dBUF; |
1155 |
|
1156 |
res = 0; |
1157 |
|
1158 |
while (count) |
1159 |
{ |
1160 |
eio_ssize_t cnt; |
1161 |
|
1162 |
cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); |
1163 |
|
1164 |
if (cnt <= 0) |
1165 |
{ |
1166 |
if (cnt && !res) res = -1; |
1167 |
break; |
1168 |
} |
1169 |
|
1170 |
cnt = write (ofd, eio_buf, cnt); |
1171 |
|
1172 |
if (cnt <= 0) |
1173 |
{ |
1174 |
if (cnt && !res) res = -1; |
1175 |
break; |
1176 |
} |
1177 |
|
1178 |
offset += cnt; |
1179 |
res += cnt; |
1180 |
count -= cnt; |
1181 |
} |
1182 |
|
1183 |
FUBd; |
1184 |
} |
1185 |
|
1186 |
return res; |
1187 |
} |
1188 |
|
1189 |
#ifdef PAGESIZE |
1190 |
# define eio_pagesize() PAGESIZE |
1191 |
#else |
1192 |
static intptr_t |
1193 |
eio_pagesize (void) |
1194 |
{ |
1195 |
static intptr_t page; |
1196 |
|
1197 |
if (!page) |
1198 |
page = sysconf (_SC_PAGESIZE); |
1199 |
|
1200 |
return page; |
1201 |
} |
1202 |
#endif |
1203 |
|
1204 |
static void |
1205 |
eio_page_align (void **addr, size_t *length) |
1206 |
{ |
1207 |
intptr_t mask = eio_pagesize () - 1; |
1208 |
|
1209 |
/* round down addr */ |
1210 |
intptr_t adj = mask & (intptr_t)*addr; |
1211 |
|
1212 |
*addr = (void *)((intptr_t)*addr - adj); |
1213 |
*length += adj; |
1214 |
|
1215 |
/* round up length */ |
1216 |
*length = (*length + mask) & ~mask; |
1217 |
} |
1218 |
|
1219 |
#if !_POSIX_MEMLOCK |
1220 |
# define eio__mlockall(a) EIO_ENOSYS () |
1221 |
#else |
1222 |
|
1223 |
static int |
1224 |
eio__mlockall (int flags) |
1225 |
{ |
1226 |
#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7 |
1227 |
extern int mallopt (int, int); |
1228 |
mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */ |
1229 |
#endif |
1230 |
|
1231 |
if (EIO_MCL_CURRENT != MCL_CURRENT |
1232 |
|| EIO_MCL_FUTURE != MCL_FUTURE) |
1233 |
{ |
1234 |
flags = 0 |
1235 |
| (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0) |
1236 |
| (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0); |
1237 |
} |
1238 |
|
1239 |
return mlockall (flags); |
1240 |
} |
1241 |
#endif |
1242 |
|
1243 |
#if !_POSIX_MEMLOCK_RANGE |
1244 |
# define eio__mlock(a,b) EIO_ENOSYS () |
1245 |
#else |
1246 |
|
1247 |
static int |
1248 |
eio__mlock (void *addr, size_t length) |
1249 |
{ |
1250 |
eio_page_align (&addr, &length); |
1251 |
|
1252 |
return mlock (addr, length); |
1253 |
} |
1254 |
|
1255 |
#endif |
1256 |
|
1257 |
#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) |
1258 |
# define eio__msync(a,b,c) EIO_ENOSYS () |
1259 |
#else |
1260 |
|
1261 |
static int |
1262 |
eio__msync (void *mem, size_t len, int flags) |
1263 |
{ |
1264 |
eio_page_align (&mem, &len); |
1265 |
|
1266 |
if (EIO_MS_ASYNC != MS_SYNC |
1267 |
|| EIO_MS_INVALIDATE != MS_INVALIDATE |
1268 |
|| EIO_MS_SYNC != MS_SYNC) |
1269 |
{ |
1270 |
flags = 0 |
1271 |
| (flags & EIO_MS_ASYNC ? MS_ASYNC : 0) |
1272 |
| (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0) |
1273 |
| (flags & EIO_MS_SYNC ? MS_SYNC : 0); |
1274 |
} |
1275 |
|
1276 |
return msync (mem, len, flags); |
1277 |
} |
1278 |
|
1279 |
#endif |
1280 |
|
1281 |
static int |
1282 |
eio__mtouch (eio_req *req) |
1283 |
{ |
1284 |
void *mem = req->ptr2; |
1285 |
size_t len = req->size; |
1286 |
int flags = req->int1; |
1287 |
|
1288 |
eio_page_align (&mem, &len); |
1289 |
|
1290 |
{ |
1291 |
intptr_t addr = (intptr_t)mem; |
1292 |
intptr_t end = addr + len; |
1293 |
intptr_t page = eio_pagesize (); |
1294 |
|
1295 |
if (addr < end) |
1296 |
if (flags & EIO_MT_MODIFY) /* modify */ |
1297 |
do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req)); |
1298 |
else |
1299 |
do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req)); |
1300 |
} |
1301 |
|
1302 |
return 0; |
1303 |
} |
1304 |
|
1305 |
/*****************************************************************************/ |
1306 |
/* requests implemented outside eio_execute, because they are so large */ |
1307 |
|
1308 |
static void |
1309 |
eio__realpath (eio_req *req, etp_worker *self) |
1310 |
{ |
1311 |
char *rel = req->ptr1; |
1312 |
char *res; |
1313 |
char *tmp1, *tmp2; |
1314 |
#if SYMLOOP_MAX > 32 |
1315 |
int symlinks = SYMLOOP_MAX; |
1316 |
#else |
1317 |
int symlinks = 32; |
1318 |
#endif |
1319 |
|
1320 |
req->result = -1; |
1321 |
|
1322 |
errno = EINVAL; |
1323 |
if (!rel) |
1324 |
return; |
1325 |
|
1326 |
errno = ENOENT; |
1327 |
if (!*rel) |
1328 |
return; |
1329 |
|
1330 |
if (!req->ptr2) |
1331 |
{ |
1332 |
X_LOCK (wrklock); |
1333 |
req->flags |= EIO_FLAG_PTR2_FREE; |
1334 |
X_UNLOCK (wrklock); |
1335 |
req->ptr2 = malloc (PATH_MAX * 3); |
1336 |
|
1337 |
errno = ENOMEM; |
1338 |
if (!req->ptr2) |
1339 |
return; |
1340 |
} |
1341 |
|
1342 |
res = req->ptr2; |
1343 |
tmp1 = res + PATH_MAX; |
1344 |
tmp2 = tmp1 + PATH_MAX; |
1345 |
|
1346 |
#if 0 /* disabled, the musl way to do things is just too racy */ |
1347 |
#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME) |
1348 |
/* on linux we may be able to ask the kernel */ |
1349 |
{ |
1350 |
int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME); |
1351 |
|
1352 |
if (fd >= 0) |
1353 |
{ |
1354 |
sprintf (tmp1, "/proc/self/fd/%d", fd); |
1355 |
req->result = readlink (tmp1, res, PATH_MAX); |
1356 |
close (fd); |
1357 |
|
1358 |
/* here we should probably stat the open file and the disk file, to make sure they still match */ |
1359 |
|
1360 |
if (req->result > 0) |
1361 |
goto done; |
1362 |
} |
1363 |
else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) |
1364 |
return; |
1365 |
} |
1366 |
#endif |
1367 |
#endif |
1368 |
|
1369 |
if (*rel != '/') |
1370 |
{ |
1371 |
if (!getcwd (res, PATH_MAX)) |
1372 |
return; |
1373 |
|
1374 |
if (res [1]) /* only use if not / */ |
1375 |
res += strlen (res); |
1376 |
} |
1377 |
|
1378 |
while (*rel) |
1379 |
{ |
1380 |
eio_ssize_t len, linklen; |
1381 |
char *beg = rel; |
1382 |
|
1383 |
while (*rel && *rel != '/') |
1384 |
++rel; |
1385 |
|
1386 |
len = rel - beg; |
1387 |
|
1388 |
if (!len) /* skip slashes */ |
1389 |
{ |
1390 |
++rel; |
1391 |
continue; |
1392 |
} |
1393 |
|
1394 |
if (beg [0] == '.') |
1395 |
{ |
1396 |
if (len == 1) |
1397 |
continue; /* . - nop */ |
1398 |
|
1399 |
if (beg [1] == '.' && len == 2) |
1400 |
{ |
1401 |
/* .. - back up one component, if possible */ |
1402 |
|
1403 |
while (res != req->ptr2) |
1404 |
if (*--res == '/') |
1405 |
break; |
1406 |
|
1407 |
continue; |
1408 |
} |
1409 |
} |
1410 |
|
1411 |
errno = ENAMETOOLONG; |
1412 |
if (res + 1 + len + 1 >= tmp1) |
1413 |
return; |
1414 |
|
1415 |
/* copy one component */ |
1416 |
*res = '/'; |
1417 |
memcpy (res + 1, beg, len); |
1418 |
|
1419 |
/* zero-terminate, for readlink */ |
1420 |
res [len + 1] = 0; |
1421 |
|
1422 |
/* now check if it's a symlink */ |
1423 |
linklen = readlink (req->ptr2, tmp1, PATH_MAX); |
1424 |
|
1425 |
if (linklen < 0) |
1426 |
{ |
1427 |
if (errno != EINVAL) |
1428 |
return; |
1429 |
|
1430 |
/* it's a normal directory. hopefully */ |
1431 |
res += len + 1; |
1432 |
} |
1433 |
else |
1434 |
{ |
1435 |
/* yay, it was a symlink - build new path in tmp2 */ |
1436 |
int rellen = strlen (rel); |
1437 |
|
1438 |
errno = ENAMETOOLONG; |
1439 |
if (linklen + 1 + rellen >= PATH_MAX) |
1440 |
return; |
1441 |
|
1442 |
errno = ELOOP; |
1443 |
if (!--symlinks) |
1444 |
return; |
1445 |
|
1446 |
if (*tmp1 == '/') |
1447 |
res = req->ptr2; /* symlink resolves to an absolute path */ |
1448 |
|
1449 |
/* we need to be careful, as rel might point into tmp2 already */ |
1450 |
memmove (tmp2 + linklen + 1, rel, rellen + 1); |
1451 |
tmp2 [linklen] = '/'; |
1452 |
memcpy (tmp2, tmp1, linklen); |
1453 |
|
1454 |
rel = tmp2; |
1455 |
} |
1456 |
} |
1457 |
|
1458 |
/* special case for the lone root path */ |
1459 |
if (res == req->ptr2) |
1460 |
*res++ = '/'; |
1461 |
|
1462 |
req->result = res - (char *)req->ptr2; |
1463 |
|
1464 |
done: |
1465 |
req->ptr2 = realloc (req->ptr2, req->result); /* trade time for space savings */ |
1466 |
} |
1467 |
|
1468 |
static signed char |
1469 |
eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) |
1470 |
{ |
1471 |
return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */ |
1472 |
: a->inode < b->inode ? -1 |
1473 |
: a->inode > b->inode ? 1 |
1474 |
: 0; |
1475 |
} |
1476 |
|
1477 |
#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0 |
1478 |
|
1479 |
#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */ |
1480 |
#define EIO_SORT_FAST 60 /* when to only use insertion sort */ |
1481 |
|
1482 |
static void |
1483 |
eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) |
1484 |
{ |
1485 |
unsigned char bits [9 + sizeof (eio_ino_t) * 8]; |
1486 |
unsigned char *bit = bits; |
1487 |
|
1488 |
assert (CHAR_BIT == 8); |
1489 |
assert (sizeof (eio_dirent) * 8 < 256); |
1490 |
assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */ |
1491 |
assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */ |
1492 |
|
1493 |
if (size <= EIO_SORT_FAST) |
1494 |
return; |
1495 |
|
1496 |
/* first prepare an array of bits to test in our radix sort */ |
1497 |
/* try to take endianness into account, as well as differences in eio_ino_t sizes */ |
1498 |
/* inode_bits must contain all inodes ORed together */ |
1499 |
/* which is used to skip bits that are 0 everywhere, which is very common */ |
1500 |
{ |
1501 |
eio_ino_t endianness; |
1502 |
int i, j; |
1503 |
|
1504 |
/* we store the byte offset of byte n into byte n of "endianness" */ |
1505 |
for (i = 0; i < sizeof (eio_ino_t); ++i) |
1506 |
((unsigned char *)&endianness)[i] = i; |
1507 |
|
1508 |
*bit++ = 0; |
1509 |
|
1510 |
for (i = 0; i < sizeof (eio_ino_t); ++i) |
1511 |
{ |
1512 |
/* shifting off the byte offsets out of "endianness" */ |
1513 |
int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8; |
1514 |
endianness >>= 8; |
1515 |
|
1516 |
for (j = 0; j < 8; ++j) |
1517 |
if (inode_bits & (((eio_ino_t)1) << (i * 8 + j))) |
1518 |
*bit++ = offs + j; |
1519 |
} |
1520 |
|
1521 |
for (j = 0; j < 8; ++j) |
1522 |
if (score_bits & (1 << j)) |
1523 |
*bit++ = offsetof (eio_dirent, score) * 8 + j; |
1524 |
} |
1525 |
|
1526 |
/* now actually do the sorting (a variant of MSD radix sort) */ |
1527 |
{ |
1528 |
eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base; |
1529 |
eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end; |
1530 |
unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8]; |
1531 |
int stk_idx = 0; |
1532 |
|
1533 |
base_stk [stk_idx] = dents; |
1534 |
end_stk [stk_idx] = dents + size; |
1535 |
bit_stk [stk_idx] = bit - 1; |
1536 |
|
1537 |
do |
1538 |
{ |
1539 |
base = base_stk [stk_idx]; |
1540 |
end = end_stk [stk_idx]; |
1541 |
bit = bit_stk [stk_idx]; |
1542 |
|
1543 |
for (;;) |
1544 |
{ |
1545 |
unsigned char O = *bit >> 3; |
1546 |
unsigned char M = 1 << (*bit & 7); |
1547 |
|
1548 |
eio_dirent *a = base; |
1549 |
eio_dirent *b = end; |
1550 |
|
1551 |
if (b - a < EIO_SORT_CUTOFF) |
1552 |
break; |
1553 |
|
1554 |
/* now bit-partition the array on the bit */ |
1555 |
/* this ugly asymmetric loop seems to perform much better than typical */ |
1556 |
/* partition algos found in the literature */ |
1557 |
do |
1558 |
if (!(((unsigned char *)a)[O] & M)) |
1559 |
++a; |
1560 |
else if (!(((unsigned char *)--b)[O] & M)) |
1561 |
{ |
1562 |
eio_dirent tmp = *a; *a = *b; *b = tmp; |
1563 |
++a; |
1564 |
} |
1565 |
while (b > a); |
1566 |
|
1567 |
/* next bit, or stop, if no bits left in this path */ |
1568 |
if (!*--bit) |
1569 |
break; |
1570 |
|
1571 |
base_stk [stk_idx] = a; |
1572 |
end_stk [stk_idx] = end; |
1573 |
bit_stk [stk_idx] = bit; |
1574 |
++stk_idx; |
1575 |
|
1576 |
end = a; |
1577 |
} |
1578 |
} |
1579 |
while (stk_idx--); |
1580 |
} |
1581 |
} |
1582 |
|
1583 |
static void |
1584 |
eio_dent_insertion_sort (eio_dirent *dents, int size) |
1585 |
{ |
1586 |
/* first move the smallest element to the front, to act as a sentinel */ |
1587 |
{ |
1588 |
int i; |
1589 |
eio_dirent *min = dents; |
1590 |
|
1591 |
/* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */ |
1592 |
for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; ) |
1593 |
if (EIO_DENT_CMP (dents [i], <, *min)) |
1594 |
min = &dents [i]; |
1595 |
|
1596 |
/* swap elements 0 and j (minimum) */ |
1597 |
{ |
1598 |
eio_dirent tmp = *dents; *dents = *min; *min = tmp; |
1599 |
} |
1600 |
} |
1601 |
|
1602 |
/* then do standard insertion sort, assuming that all elements are >= dents [0] */ |
1603 |
{ |
1604 |
eio_dirent *i, *j; |
1605 |
|
1606 |
for (i = dents + 1; i < dents + size; ++i) |
1607 |
{ |
1608 |
eio_dirent value = *i; |
1609 |
|
1610 |
for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j) |
1611 |
j [1] = j [0]; |
1612 |
|
1613 |
j [1] = value; |
1614 |
} |
1615 |
} |
1616 |
} |
1617 |
|
1618 |
static void |
1619 |
eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) |
1620 |
{ |
1621 |
if (size <= 1) |
1622 |
return; /* our insertion sort relies on size > 0 */ |
1623 |
|
1624 |
/* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */ |
1625 |
/* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */ |
1626 |
eio_dent_radix_sort (dents, size, score_bits, inode_bits); |
1627 |
|
1628 |
/* use an insertion sort at the end, or for small arrays, */ |
1629 |
/* as insertion sort is more efficient for small partitions */ |
1630 |
eio_dent_insertion_sort (dents, size); |
1631 |
} |
1632 |
|
1633 |
/* read a full directory */ |
1634 |
static void |
1635 |
eio__scandir (eio_req *req, etp_worker *self) |
1636 |
{ |
1637 |
char *name, *names; |
1638 |
int namesalloc = 4096 - sizeof (void *) * 4; |
1639 |
int namesoffs = 0; |
1640 |
int flags = req->int1; |
1641 |
eio_dirent *dents = 0; |
1642 |
int dentalloc = 128; |
1643 |
int dentoffs = 0; |
1644 |
eio_ino_t inode_bits = 0; |
1645 |
#ifdef _WIN32 |
1646 |
HANDLE dirp; |
1647 |
WIN32_FIND_DATA entp; |
1648 |
#else |
1649 |
DIR *dirp; |
1650 |
EIO_STRUCT_DIRENT *entp; |
1651 |
#endif |
1652 |
|
1653 |
req->result = -1; |
1654 |
|
1655 |
if (!(flags & EIO_READDIR_DENTS)) |
1656 |
flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); |
1657 |
|
1658 |
#ifdef _WIN32 |
1659 |
{ |
1660 |
int len = strlen ((const char *)req->ptr1); |
1661 |
char *path = malloc (MAX_PATH); |
1662 |
const char *fmt; |
1663 |
|
1664 |
if (!len) |
1665 |
fmt = "./*"; |
1666 |
else if (((const char *)req->ptr1)[len - 1] == '/' || ((const char *)req->ptr1)[len - 1] == '\\') |
1667 |
fmt = "%s*"; |
1668 |
else |
1669 |
fmt = "%s/*"; |
1670 |
|
1671 |
_snprintf (path, MAX_PATH, fmt, (const char *)req->ptr1); |
1672 |
dirp = FindFirstFile (path, &entp); |
1673 |
free (path); |
1674 |
|
1675 |
if (dirp == INVALID_HANDLE_VALUE) |
1676 |
{ |
1677 |
dirp = 0; |
1678 |
|
1679 |
switch (GetLastError ()) |
1680 |
{ |
1681 |
case ERROR_FILE_NOT_FOUND: |
1682 |
req->result = 0; |
1683 |
break; |
1684 |
|
1685 |
case ERROR_INVALID_NAME: |
1686 |
case ERROR_PATH_NOT_FOUND: |
1687 |
case ERROR_NO_MORE_FILES: |
1688 |
errno = ENOENT; |
1689 |
break; |
1690 |
|
1691 |
case ERROR_NOT_ENOUGH_MEMORY: |
1692 |
errno = ENOMEM; |
1693 |
break; |
1694 |
|
1695 |
default: |
1696 |
errno = EINVAL; |
1697 |
break; |
1698 |
} |
1699 |
} |
1700 |
} |
1701 |
#else |
1702 |
dirp = opendir (req->ptr1); |
1703 |
#endif |
1704 |
|
1705 |
if (req->flags & EIO_FLAG_PTR1_FREE) |
1706 |
free (req->ptr1); |
1707 |
|
1708 |
req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; |
1709 |
req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; |
1710 |
req->ptr2 = names = malloc (namesalloc); |
1711 |
|
1712 |
if (dirp && names && (!flags || dents)) |
1713 |
for (;;) |
1714 |
{ |
1715 |
int done; |
1716 |
|
1717 |
#ifdef _WIN32 |
1718 |
done = !dirp; |
1719 |
#else |
1720 |
errno = 0; |
1721 |
entp = readdir (dirp); |
1722 |
done = !entp; |
1723 |
#endif |
1724 |
|
1725 |
if (done) |
1726 |
{ |
1727 |
#ifndef _WIN32 |
1728 |
int old_errno = errno; |
1729 |
closedir (dirp); |
1730 |
errno = old_errno; |
1731 |
|
1732 |
if (errno) |
1733 |
break; |
1734 |
#endif |
1735 |
|
1736 |
/* sort etc. */ |
1737 |
req->int1 = flags; |
1738 |
req->result = dentoffs; |
1739 |
|
1740 |
if (flags & EIO_READDIR_STAT_ORDER) |
1741 |
eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits); |
1742 |
else if (flags & EIO_READDIR_DIRS_FIRST) |
1743 |
if (flags & EIO_READDIR_FOUND_UNKNOWN) |
1744 |
eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */ |
1745 |
else |
1746 |
{ |
1747 |
/* in this case, all is known, and we just put dirs first and sort them */ |
1748 |
eio_dirent *oth = dents + dentoffs; |
1749 |
eio_dirent *dir = dents; |
1750 |
|
1751 |
/* now partition dirs to the front, and non-dirs to the back */ |
1752 |
/* by walking from both sides and swapping if necessary */ |
1753 |
while (oth > dir) |
1754 |
{ |
1755 |
if (dir->type == EIO_DT_DIR) |
1756 |
++dir; |
1757 |
else if ((--oth)->type == EIO_DT_DIR) |
1758 |
{ |
1759 |
eio_dirent tmp = *dir; *dir = *oth; *oth = tmp; |
1760 |
|
1761 |
++dir; |
1762 |
} |
1763 |
} |
1764 |
|
1765 |
/* now sort the dirs only (dirs all have the same score) */ |
1766 |
eio_dent_sort (dents, dir - dents, 0, inode_bits); |
1767 |
} |
1768 |
|
1769 |
break; |
1770 |
} |
1771 |
|
1772 |
/* now add the entry to our list(s) */ |
1773 |
name = D_NAME (entp); |
1774 |
|
1775 |
/* skip . and .. entries */ |
1776 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
1777 |
{ |
1778 |
int len = D_NAMLEN (entp) + 1; |
1779 |
|
1780 |
while (ecb_expect_false (namesoffs + len > namesalloc)) |
1781 |
{ |
1782 |
namesalloc *= 2; |
1783 |
req->ptr2 = names = realloc (names, namesalloc); |
1784 |
|
1785 |
if (!names) |
1786 |
break; |
1787 |
} |
1788 |
|
1789 |
memcpy (names + namesoffs, name, len); |
1790 |
|
1791 |
if (dents) |
1792 |
{ |
1793 |
struct eio_dirent *ent; |
1794 |
|
1795 |
if (ecb_expect_false (dentoffs == dentalloc)) |
1796 |
{ |
1797 |
dentalloc *= 2; |
1798 |
req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); |
1799 |
|
1800 |
if (!dents) |
1801 |
break; |
1802 |
} |
1803 |
|
1804 |
ent = dents + dentoffs; |
1805 |
|
1806 |
ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */ |
1807 |
ent->namelen = len - 1; |
1808 |
ent->inode = D_INO (entp); |
1809 |
|
1810 |
inode_bits |= ent->inode; |
1811 |
|
1812 |
switch (D_TYPE (entp)) |
1813 |
{ |
1814 |
default: |
1815 |
ent->type = EIO_DT_UNKNOWN; |
1816 |
flags |= EIO_READDIR_FOUND_UNKNOWN; |
1817 |
break; |
1818 |
|
1819 |
#ifdef DT_FIFO |
1820 |
case DT_FIFO: ent->type = EIO_DT_FIFO; break; |
1821 |
#endif |
1822 |
#ifdef DT_CHR |
1823 |
case DT_CHR: ent->type = EIO_DT_CHR; break; |
1824 |
#endif |
1825 |
#ifdef DT_MPC |
1826 |
case DT_MPC: ent->type = EIO_DT_MPC; break; |
1827 |
#endif |
1828 |
#ifdef DT_DIR |
1829 |
case DT_DIR: ent->type = EIO_DT_DIR; break; |
1830 |
#endif |
1831 |
#ifdef DT_NAM |
1832 |
case DT_NAM: ent->type = EIO_DT_NAM; break; |
1833 |
#endif |
1834 |
#ifdef DT_BLK |
1835 |
case DT_BLK: ent->type = EIO_DT_BLK; break; |
1836 |
#endif |
1837 |
#ifdef DT_MPB |
1838 |
case DT_MPB: ent->type = EIO_DT_MPB; break; |
1839 |
#endif |
1840 |
#ifdef DT_REG |
1841 |
case DT_REG: ent->type = EIO_DT_REG; break; |
1842 |
#endif |
1843 |
#ifdef DT_NWK |
1844 |
case DT_NWK: ent->type = EIO_DT_NWK; break; |
1845 |
#endif |
1846 |
#ifdef DT_CMP |
1847 |
case DT_CMP: ent->type = EIO_DT_CMP; break; |
1848 |
#endif |
1849 |
#ifdef DT_LNK |
1850 |
case DT_LNK: ent->type = EIO_DT_LNK; break; |
1851 |
#endif |
1852 |
#ifdef DT_SOCK |
1853 |
case DT_SOCK: ent->type = EIO_DT_SOCK; break; |
1854 |
#endif |
1855 |
#ifdef DT_DOOR |
1856 |
case DT_DOOR: ent->type = EIO_DT_DOOR; break; |
1857 |
#endif |
1858 |
#ifdef DT_WHT |
1859 |
case DT_WHT: ent->type = EIO_DT_WHT; break; |
1860 |
#endif |
1861 |
} |
1862 |
|
1863 |
ent->score = 7; |
1864 |
|
1865 |
if (flags & EIO_READDIR_DIRS_FIRST) |
1866 |
{ |
1867 |
if (ent->type == EIO_DT_UNKNOWN) |
1868 |
{ |
1869 |
if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ |
1870 |
ent->score = 1; |
1871 |
else if (!strchr (name, '.')) /* absense of dots indicate likely dirs */ |
1872 |
ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */ |
1873 |
} |
1874 |
else if (ent->type == EIO_DT_DIR) |
1875 |
ent->score = 0; |
1876 |
} |
1877 |
} |
1878 |
|
1879 |
namesoffs += len; |
1880 |
++dentoffs; |
1881 |
} |
1882 |
|
1883 |
if (EIO_CANCELLED (req)) |
1884 |
{ |
1885 |
errno = ECANCELED; |
1886 |
break; |
1887 |
} |
1888 |
|
1889 |
#ifdef _WIN32 |
1890 |
if (!FindNextFile (dirp, &entp)) |
1891 |
{ |
1892 |
FindClose (dirp); |
1893 |
dirp = 0; |
1894 |
} |
1895 |
#endif |
1896 |
} |
1897 |
} |
1898 |
|
1899 |
/*****************************************************************************/ |
1900 |
|
1901 |
#define ALLOC(len) \ |
1902 |
if (!req->ptr2) \ |
1903 |
{ \ |
1904 |
X_LOCK (wrklock); \ |
1905 |
req->flags |= EIO_FLAG_PTR2_FREE; \ |
1906 |
X_UNLOCK (wrklock); \ |
1907 |
req->ptr2 = malloc (len); \ |
1908 |
if (!req->ptr2) \ |
1909 |
{ \ |
1910 |
errno = ENOMEM; \ |
1911 |
req->result = -1; \ |
1912 |
break; \ |
1913 |
} \ |
1914 |
} |
1915 |
|
1916 |
X_THREAD_PROC (etp_proc) |
1917 |
{ |
1918 |
ETP_REQ *req; |
1919 |
struct timespec ts; |
1920 |
etp_worker *self = (etp_worker *)thr_arg; |
1921 |
|
1922 |
#if HAVE_PRCTL_SET_NAME |
1923 |
prctl (PR_SET_NAME, (unsigned long)"eio_thread", 0, 0, 0); |
1924 |
#endif |
1925 |
|
1926 |
/* try to distribute timeouts somewhat evenly */ |
1927 |
ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); |
1928 |
|
1929 |
for (;;) |
1930 |
{ |
1931 |
ts.tv_sec = 0; |
1932 |
|
1933 |
X_LOCK (reqlock); |
1934 |
|
1935 |
for (;;) |
1936 |
{ |
1937 |
self->req = req = reqq_shift (&req_queue); |
1938 |
|
1939 |
if (req) |
1940 |
break; |
1941 |
|
1942 |
if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */ |
1943 |
{ |
1944 |
X_UNLOCK (reqlock); |
1945 |
X_LOCK (wrklock); |
1946 |
--started; |
1947 |
X_UNLOCK (wrklock); |
1948 |
goto quit; |
1949 |
} |
1950 |
|
1951 |
++idle; |
1952 |
|
1953 |
if (idle <= max_idle) |
1954 |
/* we are allowed to idle, so do so without any timeout */ |
1955 |
X_COND_WAIT (reqwait, reqlock); |
1956 |
else |
1957 |
{ |
1958 |
/* initialise timeout once */ |
1959 |
if (!ts.tv_sec) |
1960 |
ts.tv_sec = time (0) + idle_timeout; |
1961 |
|
1962 |
if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) |
1963 |
ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */ |
1964 |
} |
1965 |
|
1966 |
--idle; |
1967 |
} |
1968 |
|
1969 |
--nready; |
1970 |
|
1971 |
X_UNLOCK (reqlock); |
1972 |
|
1973 |
if (req->type < 0) |
1974 |
goto quit; |
1975 |
|
1976 |
ETP_EXECUTE (self, req); |
1977 |
|
1978 |
X_LOCK (reslock); |
1979 |
|
1980 |
++npending; |
1981 |
|
1982 |
if (!reqq_push (&res_queue, req) && want_poll_cb) |
1983 |
want_poll_cb (); |
1984 |
|
1985 |
self->req = 0; |
1986 |
etp_worker_clear (self); |
1987 |
|
1988 |
X_UNLOCK (reslock); |
1989 |
} |
1990 |
|
1991 |
quit: |
1992 |
X_LOCK (wrklock); |
1993 |
etp_worker_free (self); |
1994 |
X_UNLOCK (wrklock); |
1995 |
|
1996 |
return 0; |
1997 |
} |
1998 |
|
1999 |
/*****************************************************************************/ |
2000 |
|
2001 |
int ecb_cold |
2002 |
eio_init (void (*want_poll)(void), void (*done_poll)(void)) |
2003 |
{ |
2004 |
#if !HAVE_PREADWRITE |
2005 |
X_MUTEX_CREATE (preadwritelock); |
2006 |
#endif |
2007 |
|
2008 |
return etp_init (want_poll, done_poll); |
2009 |
} |
2010 |
|
2011 |
ecb_inline void |
2012 |
eio_api_destroy (eio_req *req) |
2013 |
{ |
2014 |
free (req); |
2015 |
} |
2016 |
|
2017 |
#define REQ(rtype) \ |
2018 |
eio_req *req; \ |
2019 |
\ |
2020 |
req = (eio_req *)calloc (1, sizeof *req); \ |
2021 |
if (!req) \ |
2022 |
return 0; \ |
2023 |
\ |
2024 |
req->type = rtype; \ |
2025 |
req->pri = pri; \ |
2026 |
req->finish = cb; \ |
2027 |
req->data = data; \ |
2028 |
req->destroy = eio_api_destroy; |
2029 |
|
2030 |
#define SEND eio_submit (req); return req |
2031 |
|
2032 |
#define PATH \ |
2033 |
req->flags |= EIO_FLAG_PTR1_FREE; \ |
2034 |
req->ptr1 = strdup (path); \ |
2035 |
if (!req->ptr1) \ |
2036 |
{ \ |
2037 |
eio_api_destroy (req); \ |
2038 |
return 0; \ |
2039 |
} |
2040 |
|
2041 |
static void |
2042 |
eio_execute (etp_worker *self, eio_req *req) |
2043 |
{ |
2044 |
if (ecb_expect_false (EIO_CANCELLED (req))) |
2045 |
{ |
2046 |
req->result = -1; |
2047 |
req->errorno = ECANCELED; |
2048 |
return; |
2049 |
} |
2050 |
|
2051 |
switch (req->type) |
2052 |
{ |
2053 |
case EIO_READ: ALLOC (req->size); |
2054 |
req->result = req->offs >= 0 |
2055 |
? pread (req->int1, req->ptr2, req->size, req->offs) |
2056 |
: read (req->int1, req->ptr2, req->size); break; |
2057 |
case EIO_WRITE: req->result = req->offs >= 0 |
2058 |
? pwrite (req->int1, req->ptr2, req->size, req->offs) |
2059 |
: write (req->int1, req->ptr2, req->size); break; |
2060 |
|
2061 |
case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; |
2062 |
case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break; |
2063 |
|
2064 |
case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
2065 |
req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; |
2066 |
case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
2067 |
req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; |
2068 |
case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); |
2069 |
req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; |
2070 |
|
2071 |
case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
2072 |
req->result = statvfs (req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
2073 |
case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); |
2074 |
req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break; |
2075 |
|
2076 |
case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; |
2077 |
case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; |
2078 |
case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; |
2079 |
case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; |
2080 |
case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; |
2081 |
case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; |
2082 |
|
2083 |
case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break; |
2084 |
case EIO_CLOSE: req->result = close (req->int1); break; |
2085 |
case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; |
2086 |
case EIO_UNLINK: req->result = unlink (req->ptr1); break; |
2087 |
case EIO_RMDIR: req->result = rmdir (req->ptr1); break; |
2088 |
case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break; |
2089 |
case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break; |
2090 |
case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break; |
2091 |
case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break; |
2092 |
case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; |
2093 |
|
2094 |
case EIO_REALPATH: eio__realpath (req, self); break; |
2095 |
|
2096 |
case EIO_READLINK: ALLOC (PATH_MAX); |
2097 |
req->result = readlink (req->ptr1, req->ptr2, PATH_MAX); break; |
2098 |
|
2099 |
case EIO_SYNC: req->result = 0; sync (); break; |
2100 |
case EIO_FSYNC: req->result = fsync (req->int1); break; |
2101 |
case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; |
2102 |
case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; |
2103 |
case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; |
2104 |
case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break; |
2105 |
case EIO_MTOUCH: req->result = eio__mtouch (req); break; |
2106 |
case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break; |
2107 |
case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break; |
2108 |
case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break; |
2109 |
|
2110 |
case EIO_READDIR: eio__scandir (req, self); break; |
2111 |
|
2112 |
case EIO_BUSY: |
2113 |
#ifdef _WIN32 |
2114 |
Sleep (req->nv1 * 1e3); |
2115 |
#else |
2116 |
{ |
2117 |
struct timeval tv; |
2118 |
|
2119 |
tv.tv_sec = req->nv1; |
2120 |
tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6; |
2121 |
|
2122 |
req->result = select (0, 0, 0, 0, &tv); |
2123 |
} |
2124 |
#endif |
2125 |
break; |
2126 |
|
2127 |
case EIO_UTIME: |
2128 |
case EIO_FUTIME: |
2129 |
{ |
2130 |
struct timeval tv[2]; |
2131 |
struct timeval *times; |
2132 |
|
2133 |
if (req->nv1 != -1. || req->nv2 != -1.) |
2134 |
{ |
2135 |
tv[0].tv_sec = req->nv1; |
2136 |
tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.; |
2137 |
tv[1].tv_sec = req->nv2; |
2138 |
tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.; |
2139 |
|
2140 |
times = tv; |
2141 |
} |
2142 |
else |
2143 |
times = 0; |
2144 |
|
2145 |
req->result = req->type == EIO_FUTIME |
2146 |
? futimes (req->int1, times) |
2147 |
: utimes (req->ptr1, times); |
2148 |
} |
2149 |
break; |
2150 |
|
2151 |
case EIO_GROUP: |
2152 |
abort (); /* handled in eio_request */ |
2153 |
|
2154 |
case EIO_NOP: |
2155 |
req->result = 0; |
2156 |
break; |
2157 |
|
2158 |
case EIO_CUSTOM: |
2159 |
req->feed (req); |
2160 |
break; |
2161 |
|
2162 |
default: |
2163 |
errno = ENOSYS; |
2164 |
req->result = -1; |
2165 |
break; |
2166 |
} |
2167 |
|
2168 |
req->errorno = errno; |
2169 |
} |
2170 |
|
2171 |
#ifndef EIO_NO_WRAPPERS |
2172 |
|
2173 |
eio_req *eio_nop (int pri, eio_cb cb, void *data) |
2174 |
{ |
2175 |
REQ (EIO_NOP); SEND; |
2176 |
} |
2177 |
|
2178 |
eio_req *eio_busy (double delay, int pri, eio_cb cb, void *data) |
2179 |
{ |
2180 |
REQ (EIO_BUSY); req->nv1 = delay; SEND; |
2181 |
} |
2182 |
|
2183 |
eio_req *eio_sync (int pri, eio_cb cb, void *data) |
2184 |
{ |
2185 |
REQ (EIO_SYNC); SEND; |
2186 |
} |
2187 |
|
2188 |
eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data) |
2189 |
{ |
2190 |
REQ (EIO_FSYNC); req->int1 = fd; SEND; |
2191 |
} |
2192 |
|
2193 |
eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) |
2194 |
{ |
2195 |
REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; |
2196 |
} |
2197 |
|
2198 |
eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) |
2199 |
{ |
2200 |
REQ (EIO_FDATASYNC); req->int1 = fd; SEND; |
2201 |
} |
2202 |
|
2203 |
eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data) |
2204 |
{ |
2205 |
REQ (EIO_SYNCFS); req->int1 = fd; SEND; |
2206 |
} |
2207 |
|
2208 |
eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) |
2209 |
{ |
2210 |
REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; |
2211 |
} |
2212 |
|
2213 |
eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) |
2214 |
{ |
2215 |
REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; |
2216 |
} |
2217 |
|
2218 |
eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) |
2219 |
{ |
2220 |
REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND; |
2221 |
} |
2222 |
|
2223 |
eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data) |
2224 |
{ |
2225 |
REQ (EIO_MLOCKALL); req->int1 = flags; SEND; |
2226 |
} |
2227 |
|
2228 |
eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data) |
2229 |
{ |
2230 |
REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND; |
2231 |
} |
2232 |
|
2233 |
eio_req *eio_close (int fd, int pri, eio_cb cb, void *data) |
2234 |
{ |
2235 |
REQ (EIO_CLOSE); req->int1 = fd; SEND; |
2236 |
} |
2237 |
|
2238 |
eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data) |
2239 |
{ |
2240 |
REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; |
2241 |
} |
2242 |
|
2243 |
eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
2244 |
{ |
2245 |
REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
2246 |
} |
2247 |
|
2248 |
eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) |
2249 |
{ |
2250 |
REQ (EIO_WRITE); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; |
2251 |
} |
2252 |
|
2253 |
eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data) |
2254 |
{ |
2255 |
REQ (EIO_FSTAT); req->int1 = fd; SEND; |
2256 |
} |
2257 |
|
2258 |
eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) |
2259 |
{ |
2260 |
REQ (EIO_FSTATVFS); req->int1 = fd; SEND; |
2261 |
} |
2262 |
|
2263 |
eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) |
2264 |
{ |
2265 |
REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; |
2266 |
} |
2267 |
|
2268 |
eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data) |
2269 |
{ |
2270 |
REQ (EIO_FTRUNCATE); req->int1 = fd; req->offs = offset; SEND; |
2271 |
} |
2272 |
|
2273 |
eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data) |
2274 |
{ |
2275 |
REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; |
2276 |
} |
2277 |
|
2278 |
eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) |
2279 |
{ |
2280 |
REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
2281 |
} |
2282 |
|
2283 |
eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data) |
2284 |
{ |
2285 |
REQ (EIO_DUP2); req->int1 = fd; req->int2 = fd2; SEND; |
2286 |
} |
2287 |
|
2288 |
eio_req *eio_sendfile (int out_fd, int in_fd, off_t in_offset, size_t length, int pri, eio_cb cb, void *data) |
2289 |
{ |
2290 |
REQ (EIO_SENDFILE); req->int1 = out_fd; req->int2 = in_fd; req->offs = in_offset; req->size = length; SEND; |
2291 |
} |
2292 |
|
2293 |
eio_req *eio_open (const char *path, int flags, mode_t mode, int pri, eio_cb cb, void *data) |
2294 |
{ |
2295 |
REQ (EIO_OPEN); PATH; req->int1 = flags; req->int2 = (long)mode; SEND; |
2296 |
} |
2297 |
|
2298 |
eio_req *eio_utime (const char *path, double atime, double mtime, int pri, eio_cb cb, void *data) |
2299 |
{ |
2300 |
REQ (EIO_UTIME); PATH; req->nv1 = atime; req->nv2 = mtime; SEND; |
2301 |
} |
2302 |
|
2303 |
eio_req *eio_truncate (const char *path, off_t offset, int pri, eio_cb cb, void *data) |
2304 |
{ |
2305 |
REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; |
2306 |
} |
2307 |
|
2308 |
eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) |
2309 |
{ |
2310 |
REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; |
2311 |
} |
2312 |
|
2313 |
eio_req *eio_chmod (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
2314 |
{ |
2315 |
REQ (EIO_CHMOD); PATH; req->int2 = (long)mode; SEND; |
2316 |
} |
2317 |
|
2318 |
eio_req *eio_mkdir (const char *path, mode_t mode, int pri, eio_cb cb, void *data) |
2319 |
{ |
2320 |
REQ (EIO_MKDIR); PATH; req->int2 = (long)mode; SEND; |
2321 |
} |
2322 |
|
2323 |
static eio_req * |
2324 |
eio__1path (int type, const char *path, int pri, eio_cb cb, void *data) |
2325 |
{ |
2326 |
REQ (type); PATH; SEND; |
2327 |
} |
2328 |
|
2329 |
eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data) |
2330 |
{ |
2331 |
return eio__1path (EIO_READLINK, path, pri, cb, data); |
2332 |
} |
2333 |
|
2334 |
eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data) |
2335 |
{ |
2336 |
return eio__1path (EIO_REALPATH, path, pri, cb, data); |
2337 |
} |
2338 |
|
2339 |
eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) |
2340 |
{ |
2341 |
return eio__1path (EIO_STAT, path, pri, cb, data); |
2342 |
} |
2343 |
|
2344 |
eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data) |
2345 |
{ |
2346 |
return eio__1path (EIO_LSTAT, path, pri, cb, data); |
2347 |
} |
2348 |
|
2349 |
eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data) |
2350 |
{ |
2351 |
return eio__1path (EIO_STATVFS, path, pri, cb, data); |
2352 |
} |
2353 |
|
2354 |
eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) |
2355 |
{ |
2356 |
return eio__1path (EIO_UNLINK, path, pri, cb, data); |
2357 |
} |
2358 |
|
2359 |
eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data) |
2360 |
{ |
2361 |
return eio__1path (EIO_RMDIR, path, pri, cb, data); |
2362 |
} |
2363 |
|
2364 |
eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data) |
2365 |
{ |
2366 |
REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; |
2367 |
} |
2368 |
|
2369 |
eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) |
2370 |
{ |
2371 |
REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND; |
2372 |
} |
2373 |
|
2374 |
static eio_req * |
2375 |
eio__2path (int type, const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2376 |
{ |
2377 |
REQ (type); PATH; |
2378 |
|
2379 |
req->flags |= EIO_FLAG_PTR2_FREE; |
2380 |
req->ptr2 = strdup (new_path); |
2381 |
if (!req->ptr2) |
2382 |
{ |
2383 |
eio_api_destroy (req); |
2384 |
return 0; |
2385 |
} |
2386 |
|
2387 |
SEND; |
2388 |
} |
2389 |
|
2390 |
eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2391 |
{ |
2392 |
return eio__2path (EIO_LINK, path, new_path, pri, cb, data); |
2393 |
} |
2394 |
|
2395 |
eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2396 |
{ |
2397 |
return eio__2path (EIO_SYMLINK, path, new_path, pri, cb, data); |
2398 |
} |
2399 |
|
2400 |
eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data) |
2401 |
{ |
2402 |
return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); |
2403 |
} |
2404 |
|
2405 |
eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) |
2406 |
{ |
2407 |
REQ (EIO_CUSTOM); req->feed = execute; SEND; |
2408 |
} |
2409 |
|
2410 |
#endif |
2411 |
|
2412 |
eio_req *eio_grp (eio_cb cb, void *data) |
2413 |
{ |
2414 |
const int pri = EIO_PRI_MAX; |
2415 |
|
2416 |
REQ (EIO_GROUP); SEND; |
2417 |
} |
2418 |
|
2419 |
#undef REQ |
2420 |
#undef PATH |
2421 |
#undef SEND |
2422 |
|
2423 |
/*****************************************************************************/ |
2424 |
/* grp functions */ |
2425 |
|
2426 |
void |
2427 |
eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) |
2428 |
{ |
2429 |
grp->int2 = limit; |
2430 |
grp->feed = feed; |
2431 |
|
2432 |
grp_try_feed (grp); |
2433 |
} |
2434 |
|
2435 |
void |
2436 |
eio_grp_limit (eio_req *grp, int limit) |
2437 |
{ |
2438 |
grp->int2 = limit; |
2439 |
|
2440 |
grp_try_feed (grp); |
2441 |
} |
2442 |
|
2443 |
void |
2444 |
eio_grp_add (eio_req *grp, eio_req *req) |
2445 |
{ |
2446 |
assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); |
2447 |
|
2448 |
grp->flags |= EIO_FLAG_GROUPADD; |
2449 |
|
2450 |
++grp->size; |
2451 |
req->grp = grp; |
2452 |
|
2453 |
req->grp_prev = 0; |
2454 |
req->grp_next = grp->grp_first; |
2455 |
|
2456 |
if (grp->grp_first) |
2457 |
grp->grp_first->grp_prev = req; |
2458 |
|
2459 |
grp->grp_first = req; |
2460 |
} |
2461 |
|
2462 |
/*****************************************************************************/ |
2463 |
/* misc garbage */ |
2464 |
|
2465 |
eio_ssize_t |
2466 |
eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) |
2467 |
{ |
2468 |
return eio__sendfile (ofd, ifd, offset, count); |
2469 |
} |
2470 |
|