--- libeio/eio.c 2008/05/13 18:54:52 1.12 +++ libeio/eio.c 2012/04/24 18:47:50 1.120 @@ -1,4 +1,52 @@ +/* + * libeio implementation + * + * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modifica- + * tion, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- + * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO + * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- + * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, + * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; + * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- + * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED + * OF THE POSSIBILITY OF SUCH DAMAGE. + * + * Alternatively, the contents of this file may be used under the terms of + * the GNU General Public License ("GPL") version 2 or any later version, + * in which case the provisions of the GPL are applicable instead of + * the above. If you wish to allow the use of your version of this file + * only under the terms of the GPL and not to allow others to use your + * version of this file under the BSD license, indicate your decision + * by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL. If you do not delete the + * provisions above, a recipient may use your version of this file under + * either the BSD or the GPL. + */ + +#ifndef _WIN32 +# include "config.h" +#endif + #include "eio.h" +#include "ecb.h" + +#ifdef EIO_STACKSIZE +# define X_STACKSIZE EIO_STACKSIZE +#endif #include "xthread.h" #include @@ -12,6 +60,25 @@ #include #include +/* intptr_t comes from unistd.h, says POSIX/UNIX/tradition */ +/* intptr_t only comes from stdint.h, says idiot openbsd coder */ +#if HAVE_STDINT_H +# include +#endif + +#ifndef ECANCELED +# define ECANCELED EDOM +#endif +#ifndef ELOOP +# define ELOOP EDOM +#endif + +#if !defined(ENOTSOCK) && defined(WSAENOTSOCK) +# define ENOTSOCK WSAENOTSOCK +#endif + +static void eio_destroy (eio_req *req); + #ifndef EIO_FINISH # define EIO_FINISH(req) ((req)->finish) && !EIO_CANCELLED (req) ? (req)->finish (req) : 0 #endif @@ -24,71 +91,272 @@ # define EIO_FEED(req) do { if ((req)->feed ) (req)->feed (req); } while (0) #endif +#ifndef EIO_FD_TO_WIN32_HANDLE +# define EIO_FD_TO_WIN32_HANDLE(fd) _get_osfhandle (fd) +#endif +#ifndef EIO_WIN32_HANDLE_TO_FD +# define EIO_WIN32_HANDLE_TO_FD(handle) _open_osfhandle (handle, 0) +#endif + +#define EIO_ERRNO(errval,retval) ((errno = errval), retval) + +#define EIO_ENOSYS() EIO_ERRNO (ENOSYS, -1) + #ifdef _WIN32 - /*doh*/ + #undef PAGESIZE + #define PAGESIZE 4096 /* GetSystemInfo? */ + + /* TODO: look at how perl does stat (non-sloppy), unlink (ro-files), utime, link */ + + #ifdef EIO_STRUCT_STATI64 + /* look at perl's non-sloppy stat */ + #define stat(path,buf) _stati64 (path,buf) + #define fstat(fd,buf) _fstati64 (fd,buf) + #endif + #define lstat(path,buf) stat (path,buf) + #define fsync(fd) (FlushFileBuffers ((HANDLE)EIO_FD_TO_WIN32_HANDLE (fd)) ? 0 : EIO_ERRNO (EBADF, -1)) + #define mkdir(path,mode) _mkdir (path) + #define link(old,neu) (CreateHardLink (neu, old, 0) ? 0 : EIO_ERRNO (ENOENT, -1)) + + #define chmod(path,mode) _chmod (path, mode) + #define dup(fd) _dup (fd) + #define dup2(fd1,fd2) _dup2 (fd1, fd2) + + #define fchmod(fd,mode) EIO_ENOSYS () + #define chown(path,uid,gid) EIO_ENOSYS () + #define fchown(fd,uid,gid) EIO_ENOSYS () + #define truncate(path,offs) EIO_ENOSYS () /* far-miss: SetEndOfFile */ + #define ftruncate(fd,offs) EIO_ENOSYS () /* near-miss: SetEndOfFile */ + #define mknod(path,mode,dev) EIO_ENOSYS () + #define sync() EIO_ENOSYS () + #define readlink(path,buf,s) EIO_ENOSYS () + #define statvfs(path,buf) EIO_ENOSYS () + #define fstatvfs(fd,buf) EIO_ENOSYS () + + /* rename() uses MoveFile, which fails to overwrite */ + #define rename(old,neu) eio__rename (old, neu) + + static int + eio__rename (const char *old, const char *neu) + { + if (MoveFileEx (old, neu, MOVEFILE_REPLACE_EXISTING)) + return 0; + + /* should steal _dosmaperr */ + switch (GetLastError ()) + { + case ERROR_FILE_NOT_FOUND: + case ERROR_PATH_NOT_FOUND: + case ERROR_INVALID_DRIVE: + case ERROR_NO_MORE_FILES: + case ERROR_BAD_NETPATH: + case ERROR_BAD_NET_NAME: + case ERROR_BAD_PATHNAME: + case ERROR_FILENAME_EXCED_RANGE: + errno = ENOENT; + break; + + default: + errno = EACCES; + break; + } + + return -1; + } + + /* we could even stat and see if it exists */ + static int + symlink (const char *old, const char *neu) + { + #if WINVER >= 0x0600 + if (CreateSymbolicLink (neu, old, 1)) + return 0; + + if (CreateSymbolicLink (neu, old, 0)) + return 0; + #endif + + return EIO_ERRNO (ENOENT, -1); + } + + /* POSIX API only */ + #define CreateHardLink(neu,old,flags) 0 + #define CreateSymbolicLink(neu,old,flags) 0 + + struct statvfs + { + int dummy; + }; + + #define DT_DIR EIO_DT_DIR + #define DT_REG EIO_DT_REG + #define D_NAME(entp) entp.cFileName + #define D_TYPE(entp) (entp.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY ? DT_DIR : DT_REG) #else -# include "config.h" -# include -# include -# include + #include + #include + #include + #include + #include + #include + + #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES + #include + #endif + + #define D_NAME(entp) entp->d_name + + /* POSIX_SOURCE is useless on bsd's, and XOPEN_SOURCE is unreliable there, too */ + #if __FreeBSD__ || __NetBSD__ || __OpenBSD__ + #define _DIRENT_HAVE_D_TYPE /* sigh */ + #define D_INO(de) (de)->d_fileno + #define D_NAMLEN(de) (de)->d_namlen + #elif __linux || defined d_ino || _XOPEN_SOURCE >= 600 + #define D_INO(de) (de)->d_ino + #endif + + #ifdef _D_EXACT_NAMLEN + #undef D_NAMLEN + #define D_NAMLEN(de) _D_EXACT_NAMLEN (de) + #endif + + #ifdef _DIRENT_HAVE_D_TYPE + #define D_TYPE(de) (de)->d_type + #endif + + #ifndef EIO_STRUCT_DIRENT + #define EIO_STRUCT_DIRENT struct dirent + #endif + +#endif + +#if HAVE_UTIMES # include -# include -# include +#endif -# ifndef EIO_STRUCT_DIRENT -# define EIO_STRUCT_DIRENT struct dirent -# endif +#if HAVE_SYS_SYSCALL_H +# include +#endif +#if HAVE_SYS_PRCTL_H +# include #endif #if HAVE_SENDFILE # if __linux # include -# elif __freebsd +# elif __FreeBSD__ || defined __APPLE__ # include # include # elif __hpux # include -# elif __solaris /* not yet */ +# elif __solaris # include # else # error sendfile support requested but not available # endif #endif -/* number of seconds after which an idle threads exit */ -#define IDLE_TIMEOUT 10 +#ifndef D_TYPE +# define D_TYPE(de) 0 +#endif +#ifndef D_INO +# define D_INO(de) 0 +#endif +#ifndef D_NAMLEN +# define D_NAMLEN(entp) strlen (D_NAME (entp)) +#endif /* used for struct dirent, AIX doesn't provide it */ #ifndef NAME_MAX # define NAME_MAX 4096 #endif +/* used for readlink etc. */ +#ifndef PATH_MAX +# define PATH_MAX 4096 +#endif + /* buffer size for various temporary buffers */ #define EIO_BUFSIZE 65536 #define dBUF \ - char *eio_buf; \ - X_LOCK (wrklock); \ - self->dbuf = eio_buf = malloc (EIO_BUFSIZE); \ - X_UNLOCK (wrklock); \ + char *eio_buf = malloc (EIO_BUFSIZE); \ errno = ENOMEM; \ if (!eio_buf) \ - return -1; + return -1 + +#define FUBd \ + free (eio_buf) #define EIO_TICKS ((1000000 + 1023) >> 10) -static void (*want_poll_cb) (void); -static void (*done_poll_cb) (void); +/*****************************************************************************/ + +struct tmpbuf +{ + void *ptr; + int len; +}; + +static void * +tmpbuf_get (struct tmpbuf *buf, int len) +{ + if (buf->len < len) + { + free (buf->ptr); + buf->ptr = malloc (buf->len = len); + } -static unsigned int max_poll_time = 0; -static unsigned int max_poll_reqs = 0; + return buf->ptr; +} + +struct tmpbuf; + +#if _POSIX_VERSION >= 200809L + #define HAVE_AT 1 + #define WD2FD(wd) ((wd) ? (wd)->fd : AT_FDCWD) + #ifndef O_SEARCH + #define O_SEARCH O_RDONLY + #endif +#else + #define HAVE_AT 0 + static const char *wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path); +#endif -/* calculcate time difference in ~1/EIO_TICKS of a second */ -static int tvdiff (struct timeval *tv1, struct timeval *tv2) +struct eio_pwd +{ +#if HAVE_AT + int fd; +#endif + int len; + char str[1]; /* actually, a 0-terminated canonical path */ +}; + +/*****************************************************************************/ + +#define ETP_PRI_MIN EIO_PRI_MIN +#define ETP_PRI_MAX EIO_PRI_MAX + +struct etp_worker; + +#define ETP_REQ eio_req +#define ETP_DESTROY(req) eio_destroy (req) +static int eio_finish (eio_req *req); +#define ETP_FINISH(req) eio_finish (req) +static void eio_execute (struct etp_worker *self, eio_req *req); +#define ETP_EXECUTE(wrk,req) eio_execute (wrk,req) + +/*****************************************************************************/ + +#define ETP_NUM_PRI (ETP_PRI_MAX - ETP_PRI_MIN + 1) + +/* calculate time difference in ~1/EIO_TICKS of a second */ +ecb_inline int +tvdiff (struct timeval *tv1, struct timeval *tv2) { return (tv2->tv_sec - tv1->tv_sec ) * EIO_TICKS + ((tv2->tv_usec - tv1->tv_usec) >> 10); @@ -96,60 +364,81 @@ static unsigned int started, idle, wanted = 4; -/* worker threads management */ -static mutex_t wrklock = X_MUTEX_INIT; +static void (*want_poll_cb) (void); +static void (*done_poll_cb) (void); + +static unsigned int max_poll_time; /* reslock */ +static unsigned int max_poll_reqs; /* reslock */ + +static unsigned int nreqs; /* reqlock */ +static unsigned int nready; /* reqlock */ +static unsigned int npending; /* reqlock */ +static unsigned int max_idle = 4; /* maximum number of threads that can idle indefinitely */ +static unsigned int idle_timeout = 10; /* number of seconds after which an idle threads exit */ + +static xmutex_t wrklock; +static xmutex_t reslock; +static xmutex_t reqlock; +static xcond_t reqwait; + +#if !HAVE_PREADWRITE +/* + * make our pread/pwrite emulation safe against themselves, but not against + * normal read/write by using a mutex. slows down execution a lot, + * but that's your problem, not mine. + */ +static xmutex_t preadwritelock; +#endif -typedef struct worker +typedef struct etp_worker { + struct tmpbuf tmpbuf; + /* locked by wrklock */ - struct worker *prev, *next; + struct etp_worker *prev, *next; - thread_t tid; + xthread_t tid; - /* locked by reslock, reqlock or wrklock */ - eio_req *req; /* currently processed request */ - void *dbuf; - DIR *dirp; -} worker; +#ifdef ETP_WORKER_COMMON + ETP_WORKER_COMMON +#endif +} etp_worker; -static worker wrk_first = { &wrk_first, &wrk_first, 0 }; +static etp_worker wrk_first; /* NOT etp */ -static void worker_clear (worker *wrk) -{ - if (wrk->dirp) - { - closedir (wrk->dirp); - wrk->dirp = 0; - } +#define ETP_WORKER_LOCK(wrk) X_LOCK (wrklock) +#define ETP_WORKER_UNLOCK(wrk) X_UNLOCK (wrklock) - if (wrk->dbuf) - { - free (wrk->dbuf); - wrk->dbuf = 0; - } +/* worker threads management */ + +static void +etp_worker_clear (etp_worker *wrk) +{ } -static void worker_free (worker *wrk) +static void ecb_cold +etp_worker_free (etp_worker *wrk) { + free (wrk->tmpbuf.ptr); + wrk->next->prev = wrk->prev; wrk->prev->next = wrk->next; free (wrk); } -static volatile unsigned int nreqs, nready, npending; -static volatile unsigned int max_idle = 4; - -static mutex_t reslock = X_MUTEX_INIT; -static mutex_t reqlock = X_MUTEX_INIT; -static cond_t reqwait = X_COND_INIT; - -unsigned int eio_nreqs (void) +static unsigned int +etp_nreqs (void) { - return nreqs; + int retval; + if (WORDACCESS_UNSAFE) X_LOCK (reqlock); + retval = nreqs; + if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); + return retval; } -unsigned int eio_nready (void) +static unsigned int +etp_nready (void) { unsigned int retval; @@ -160,7 +449,8 @@ return retval; } -unsigned int eio_npending (void) +static unsigned int +etp_npending (void) { unsigned int retval; @@ -171,7 +461,8 @@ return retval; } -unsigned int eio_nthreads (void) +static unsigned int +etp_nthreads (void) { unsigned int retval; @@ -188,14 +479,26 @@ * per shift, the most expensive operation. */ typedef struct { - eio_req *qs[EIO_NUM_PRI], *qe[EIO_NUM_PRI]; /* qstart, qend */ + ETP_REQ *qs[ETP_NUM_PRI], *qe[ETP_NUM_PRI]; /* qstart, qend */ int size; -} reqq; +} etp_reqq; -static reqq req_queue; -static reqq res_queue; +static etp_reqq req_queue; +static etp_reqq res_queue; -static int reqq_push (reqq *q, eio_req *req) +static void ecb_noinline ecb_cold +reqq_init (etp_reqq *q) +{ + int pri; + + for (pri = 0; pri < ETP_NUM_PRI; ++pri) + q->qs[pri] = q->qe[pri] = 0; + + q->size = 0; +} + +static int ecb_noinline +reqq_push (etp_reqq *q, ETP_REQ *req) { int pri = req->pri; req->next = 0; @@ -211,7 +514,8 @@ return q->size++; } -static eio_req *reqq_shift (reqq *q) +static ETP_REQ * ecb_noinline +reqq_shift (etp_reqq *q) { int pri; @@ -220,7 +524,7 @@ --q->size; - for (pri = EIO_NUM_PRI; pri--; ) + for (pri = ETP_NUM_PRI; pri--; ) { eio_req *req = q->qs[pri]; @@ -236,16 +540,265 @@ abort (); } -static void grp_try_feed (eio_req *grp) +static int ecb_cold +etp_init (void (*want_poll)(void), void (*done_poll)(void)) +{ + X_MUTEX_CREATE (wrklock); + X_MUTEX_CREATE (reslock); + X_MUTEX_CREATE (reqlock); + X_COND_CREATE (reqwait); + + reqq_init (&req_queue); + reqq_init (&res_queue); + + wrk_first.next = + wrk_first.prev = &wrk_first; + + started = 0; + idle = 0; + nreqs = 0; + nready = 0; + npending = 0; + + want_poll_cb = want_poll; + done_poll_cb = done_poll; + + return 0; +} + +X_THREAD_PROC (etp_proc); + +static void ecb_cold +etp_start_thread (void) +{ + etp_worker *wrk = calloc (1, sizeof (etp_worker)); + + /*TODO*/ + assert (("unable to allocate worker thread data", wrk)); + + X_LOCK (wrklock); + + if (thread_create (&wrk->tid, etp_proc, (void *)wrk)) + { + wrk->prev = &wrk_first; + wrk->next = wrk_first.next; + wrk_first.next->prev = wrk; + wrk_first.next = wrk; + ++started; + } + else + free (wrk); + + X_UNLOCK (wrklock); +} + +static void +etp_maybe_start_thread (void) +{ + if (ecb_expect_true (etp_nthreads () >= wanted)) + return; + + /* todo: maybe use idle here, but might be less exact */ + if (ecb_expect_true (0 <= (int)etp_nthreads () + (int)etp_npending () - (int)etp_nreqs ())) + return; + + etp_start_thread (); +} + +static void ecb_cold +etp_end_thread (void) +{ + eio_req *req = calloc (1, sizeof (eio_req)); /* will be freed by worker */ + + req->type = -1; + req->pri = ETP_PRI_MAX - ETP_PRI_MIN; + + X_LOCK (reqlock); + reqq_push (&req_queue, req); + X_COND_SIGNAL (reqwait); + X_UNLOCK (reqlock); + + X_LOCK (wrklock); + --started; + X_UNLOCK (wrklock); +} + +static int +etp_poll (void) +{ + unsigned int maxreqs; + unsigned int maxtime; + struct timeval tv_start, tv_now; + + X_LOCK (reslock); + maxreqs = max_poll_reqs; + maxtime = max_poll_time; + X_UNLOCK (reslock); + + if (maxtime) + gettimeofday (&tv_start, 0); + + for (;;) + { + ETP_REQ *req; + + etp_maybe_start_thread (); + + X_LOCK (reslock); + req = reqq_shift (&res_queue); + + if (req) + { + --npending; + + if (!res_queue.size && done_poll_cb) + done_poll_cb (); + } + + X_UNLOCK (reslock); + + if (!req) + return 0; + + X_LOCK (reqlock); + --nreqs; + X_UNLOCK (reqlock); + + if (ecb_expect_false (req->type == EIO_GROUP && req->size)) + { + req->int1 = 1; /* mark request as delayed */ + continue; + } + else + { + int res = ETP_FINISH (req); + if (ecb_expect_false (res)) + return res; + } + + if (ecb_expect_false (maxreqs && !--maxreqs)) + break; + + if (maxtime) + { + gettimeofday (&tv_now, 0); + + if (tvdiff (&tv_start, &tv_now) >= maxtime) + break; + } + } + + errno = EAGAIN; + return -1; +} + +static void +etp_cancel (ETP_REQ *req) +{ + req->cancelled = 1; + + eio_grp_cancel (req); +} + +static void +etp_submit (ETP_REQ *req) +{ + req->pri -= ETP_PRI_MIN; + + if (ecb_expect_false (req->pri < ETP_PRI_MIN - ETP_PRI_MIN)) req->pri = ETP_PRI_MIN - ETP_PRI_MIN; + if (ecb_expect_false (req->pri > ETP_PRI_MAX - ETP_PRI_MIN)) req->pri = ETP_PRI_MAX - ETP_PRI_MIN; + + if (ecb_expect_false (req->type == EIO_GROUP)) + { + /* I hope this is worth it :/ */ + X_LOCK (reqlock); + ++nreqs; + X_UNLOCK (reqlock); + + X_LOCK (reslock); + + ++npending; + + if (!reqq_push (&res_queue, req) && want_poll_cb) + want_poll_cb (); + + X_UNLOCK (reslock); + } + else + { + X_LOCK (reqlock); + ++nreqs; + ++nready; + reqq_push (&req_queue, req); + X_COND_SIGNAL (reqwait); + X_UNLOCK (reqlock); + + etp_maybe_start_thread (); + } +} + +static void ecb_cold +etp_set_max_poll_time (double nseconds) +{ + if (WORDACCESS_UNSAFE) X_LOCK (reslock); + max_poll_time = nseconds * EIO_TICKS; + if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); +} + +static void ecb_cold +etp_set_max_poll_reqs (unsigned int maxreqs) +{ + if (WORDACCESS_UNSAFE) X_LOCK (reslock); + max_poll_reqs = maxreqs; + if (WORDACCESS_UNSAFE) X_UNLOCK (reslock); +} + +static void ecb_cold +etp_set_max_idle (unsigned int nthreads) +{ + if (WORDACCESS_UNSAFE) X_LOCK (reqlock); + max_idle = nthreads; + if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); +} + +static void ecb_cold +etp_set_idle_timeout (unsigned int seconds) +{ + if (WORDACCESS_UNSAFE) X_LOCK (reqlock); + idle_timeout = seconds; + if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); +} + +static void ecb_cold +etp_set_min_parallel (unsigned int nthreads) +{ + if (wanted < nthreads) + wanted = nthreads; +} + +static void ecb_cold +etp_set_max_parallel (unsigned int nthreads) +{ + if (wanted > nthreads) + wanted = nthreads; + + while (started > wanted) + etp_end_thread (); +} + +/*****************************************************************************/ + +static void +grp_try_feed (eio_req *grp) { while (grp->size < grp->int2 && !EIO_CANCELLED (grp)) { - int old_len = grp->size; + grp->flags &= ~EIO_FLAG_GROUPADD; EIO_FEED (grp); /* stop if no progress has been made */ - if (old_len == grp->size) + if (!(grp->flags & EIO_FLAG_GROUPADD)) { grp->feed = 0; break; @@ -253,9 +806,8 @@ } } -static int eio_finish (eio_req *req); - -static int grp_dec (eio_req *grp) +static int +grp_dec (eio_req *grp) { --grp->size; @@ -269,7 +821,8 @@ return 0; } -void eio_destroy (eio_req *req) +static void +eio_destroy (eio_req *req) { if ((req)->flags & EIO_FLAG_PTR1_FREE) free (req->ptr1); if ((req)->flags & EIO_FLAG_PTR2_FREE) free (req->ptr2); @@ -277,7 +830,8 @@ EIO_DESTROY (req); } -static int eio_finish (eio_req *req) +static int +eio_finish (eio_req *req) { int res = EIO_FINISH (req); @@ -295,7 +849,7 @@ res2 = grp_dec (grp); - if (!res && res2) + if (!res) res = res2; } @@ -304,206 +858,103 @@ return res; } -void eio_grp_cancel (eio_req *grp) +void +eio_grp_cancel (eio_req *grp) { for (grp = grp->grp_first; grp; grp = grp->grp_next) eio_cancel (grp); } -void eio_cancel (eio_req *req) +void +eio_cancel (eio_req *req) { - X_LOCK (wrklock); - req->flags |= EIO_FLAG_CANCELLED; - X_UNLOCK (wrklock); - - eio_grp_cancel (req); + etp_cancel (req); } -X_THREAD_PROC (eio_proc); - -static void start_thread (void) +void +eio_submit (eio_req *req) { - worker *wrk = calloc (1, sizeof (worker)); - - /*TODO*/ - assert (("unable to allocate worker thread data", wrk)); - - X_LOCK (wrklock); - - if (thread_create (&wrk->tid, eio_proc, (void *)wrk)) - { - wrk->prev = &wrk_first; - wrk->next = wrk_first.next; - wrk_first.next->prev = wrk; - wrk_first.next = wrk; - ++started; - } - else - free (wrk); - - X_UNLOCK (wrklock); + etp_submit (req); } -static void maybe_start_thread (void) +unsigned int +eio_nreqs (void) { - if (eio_nthreads () >= wanted) - return; - - /* todo: maybe use idle here, but might be less exact */ - if (0 <= (int)eio_nthreads () + (int)eio_npending () - (int)eio_nreqs ()) - return; - - start_thread (); + return etp_nreqs (); } -void eio_submit (eio_req *req) +unsigned int +eio_nready (void) { - req->pri += EIO_PRI_BIAS; - - if (req->pri < EIO_PRI_MIN + EIO_PRI_BIAS) req->pri = EIO_PRI_MIN + EIO_PRI_BIAS; - if (req->pri > EIO_PRI_MAX + EIO_PRI_BIAS) req->pri = EIO_PRI_MAX + EIO_PRI_BIAS; - - ++nreqs; - - X_LOCK (reqlock); - ++nready; - reqq_push (&req_queue, req); - X_COND_SIGNAL (reqwait); - X_UNLOCK (reqlock); - - maybe_start_thread (); + return etp_nready (); } -static void end_thread (void) +unsigned int +eio_npending (void) { - eio_req *req = calloc (1, sizeof (eio_req)); - - req->type = EIO_QUIT; - req->pri = EIO_PRI_MAX + EIO_PRI_BIAS; - - X_LOCK (reqlock); - reqq_push (&req_queue, req); - X_COND_SIGNAL (reqwait); - X_UNLOCK (reqlock); + return etp_npending (); +} - X_LOCK (wrklock); - --started; - X_UNLOCK (wrklock); +unsigned int ecb_cold +eio_nthreads (void) +{ + return etp_nthreads (); } -void eio_set_max_poll_time (double nseconds) +void ecb_cold +eio_set_max_poll_time (double nseconds) { - if (WORDACCESS_UNSAFE) X_LOCK (reqlock); - max_poll_time = nseconds; - if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); + etp_set_max_poll_time (nseconds); } -void eio_set_max_poll_reqs (unsigned int maxreqs) +void ecb_cold +eio_set_max_poll_reqs (unsigned int maxreqs) { - if (WORDACCESS_UNSAFE) X_LOCK (reqlock); - max_poll_reqs = maxreqs; - if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); + etp_set_max_poll_reqs (maxreqs); } -void eio_set_max_idle (unsigned int nthreads) +void ecb_cold +eio_set_max_idle (unsigned int nthreads) { - if (WORDACCESS_UNSAFE) X_LOCK (reqlock); - max_idle = nthreads <= 0 ? 1 : nthreads; - if (WORDACCESS_UNSAFE) X_UNLOCK (reqlock); + etp_set_max_idle (nthreads); } -void eio_set_min_parallel (unsigned int nthreads) +void ecb_cold +eio_set_idle_timeout (unsigned int seconds) { - if (wanted < nthreads) - wanted = nthreads; + etp_set_idle_timeout (seconds); } -void eio_set_max_parallel (unsigned int nthreads) +void ecb_cold +eio_set_min_parallel (unsigned int nthreads) { - if (wanted > nthreads) - wanted = nthreads; + etp_set_min_parallel (nthreads); +} - while (started > wanted) - end_thread (); +void ecb_cold +eio_set_max_parallel (unsigned int nthreads) +{ + etp_set_max_parallel (nthreads); } int eio_poll (void) { - int maxreqs = max_poll_reqs; - struct timeval tv_start, tv_now; - eio_req *req; - - if (max_poll_time) - gettimeofday (&tv_start, 0); - - for (;;) - { - maybe_start_thread (); - - X_LOCK (reslock); - req = reqq_shift (&res_queue); - - if (req) - { - --npending; - - if (!res_queue.size && done_poll_cb) - done_poll_cb (); - } - - X_UNLOCK (reslock); - - if (!req) - return 0; - - --nreqs; - - if (req->type == EIO_GROUP && req->size) - { - req->int1 = 1; /* mark request as delayed */ - continue; - } - else - { - int res = eio_finish (req); - if (res) - return res; - } - - if (maxreqs && !--maxreqs) - break; - - if (max_poll_time) - { - gettimeofday (&tv_now, 0); - - if (tvdiff (&tv_start, &tv_now) >= max_poll_time) - break; - } - } - - errno = EAGAIN; - return -1; + return etp_poll (); } /*****************************************************************************/ /* work around various missing functions */ #if !HAVE_PREADWRITE +# undef pread +# undef pwrite # define pread eio__pread # define pwrite eio__pwrite -/* - * make our pread/pwrite safe against themselves, but not against - * normal read/write by using a mutex. slows down execution a lot, - * but that's your problem, not mine. - */ -static mutex_t preadwritelock = X_MUTEX_INIT; - -static ssize_t +static eio_ssize_t eio__pread (int fd, void *buf, size_t count, off_t offset) { - ssize_t res; + eio_ssize_t res; off_t ooffset; X_LOCK (preadwritelock); @@ -516,27 +967,27 @@ return res; } -static ssize_t +static eio_ssize_t eio__pwrite (int fd, void *buf, size_t count, off_t offset) { - ssize_t res; + eio_ssize_t res; off_t ooffset; X_LOCK (preadwritelock); ooffset = lseek (fd, 0, SEEK_CUR); lseek (fd, offset, SEEK_SET); res = write (fd, buf, count); - lseek (fd, offset, SEEK_SET); + lseek (fd, ooffset, SEEK_SET); X_UNLOCK (preadwritelock); return res; } #endif -#ifndef HAVE_FUTIMES +#ifndef HAVE_UTIMES -# define utimes(path,times) eio__utimes (path, times) -# define futimes(fd,times) eio__futimes (fd, times) +# undef utimes +# define utimes(path,times) eio__utimes (path, times) static int eio__utimes (const char *filename, const struct timeval times[2]) @@ -554,7 +1005,15 @@ return utime (filename, 0); } -static int eio__futimes (int fd, const struct timeval tv[2]) +#endif + +#ifndef HAVE_FUTIMES + +# undef futimes +# define futimes(fd,times) eio__futimes (fd, times) + +static int +eio__futimes (int fd, const struct timeval tv[2]) { errno = ENOSYS; return -1; @@ -563,118 +1022,205 @@ #endif #if !HAVE_FDATASYNC -# define fdatasync fsync +# undef fdatasync +# define fdatasync(fd) fsync (fd) #endif -#if !HAVE_READAHEAD -# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) +static int +eio__syncfs (int fd) +{ + int res; + +#if HAVE_SYS_SYNCFS + res = (int)syscall (__NR_syncfs, (int)(fd)); +#else + res = EIO_ENOSYS (); +#endif + + if (res < 0 && errno == ENOSYS && fd >= 0) + sync (); -static ssize_t -eio__readahead (int fd, off_t offset, size_t count, worker *self) + return res; +} + +/* sync_file_range always needs emulation */ +static int +eio__sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags) { - size_t todo = count; - dBUF; +#if HAVE_SYNC_FILE_RANGE + int res; - while (todo > 0) + if (EIO_SYNC_FILE_RANGE_WAIT_BEFORE != SYNC_FILE_RANGE_WAIT_BEFORE + || EIO_SYNC_FILE_RANGE_WRITE != SYNC_FILE_RANGE_WRITE + || EIO_SYNC_FILE_RANGE_WAIT_AFTER != SYNC_FILE_RANGE_WAIT_AFTER) { - size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; - - pread (fd, eio_buf, len, offset); - offset += len; - todo -= len; + flags = 0 + | (flags & EIO_SYNC_FILE_RANGE_WAIT_BEFORE ? SYNC_FILE_RANGE_WAIT_BEFORE : 0) + | (flags & EIO_SYNC_FILE_RANGE_WRITE ? SYNC_FILE_RANGE_WRITE : 0) + | (flags & EIO_SYNC_FILE_RANGE_WAIT_AFTER ? SYNC_FILE_RANGE_WAIT_AFTER : 0); } - errno = 0; - return count; -} + res = sync_file_range (fd, offset, nbytes, flags); + if (!res || errno != ENOSYS) + return res; #endif -#if !HAVE_READDIR_R -# define readdir_r eio__readdir_r + /* even though we could play tricks with the flags, it's better to always + * call fdatasync, as that matches the expectation of its users best */ + return fdatasync (fd); +} -static mutex_t readdirlock = X_MUTEX_INIT; - static int -eio__readdir_r (DIR *dirp, EIO_STRUCT_DIRENT *ent, EIO_STRUCT_DIRENT **res) +eio__fallocate (int fd, int mode, off_t offset, size_t len) { - EIO_STRUCT_DIRENT *e; - int errorno; +#if HAVE_LINUX_FALLOCATE + return fallocate (fd, mode, offset, len); +#else + return EIO_ENOSYS (); +#endif +} - X_LOCK (readdirlock); +#if !HAVE_READAHEAD +# undef readahead +# define readahead(fd,offset,count) eio__readahead (fd, offset, count, self) - e = readdir (dirp); - errorno = errno; +static eio_ssize_t +eio__readahead (int fd, off_t offset, size_t count, etp_worker *self) +{ + size_t todo = count; + dBUF; - if (e) + while (todo > 0) { - *res = ent; - strcpy (ent->d_name, e->d_name); + size_t len = todo < EIO_BUFSIZE ? todo : EIO_BUFSIZE; + + pread (fd, eio_buf, len, offset); + offset += len; + todo -= len; } - else - *res = 0; - X_UNLOCK (readdirlock); + FUBd; - errno = errorno; - return e ? 0 : -1; + /* linux's readahead basically only fails for EBADF or EINVAL (not mmappable) */ + /* but not for e.g. EIO or eof, so we also never fail */ + return 0; } + #endif /* sendfile always needs emulation */ -static ssize_t -eio__sendfile (int ofd, int ifd, off_t offset, size_t count, worker *self) +static eio_ssize_t +eio__sendfile (int ofd, int ifd, off_t offset, size_t count) { - ssize_t res; + eio_ssize_t written = 0; + eio_ssize_t res; if (!count) return 0; + for (;;) + { +#ifdef __APPLE__ +# undef HAVE_SENDFILE /* broken, as everything on os x */ +#endif #if HAVE_SENDFILE # if __linux - res = sendfile (ofd, ifd, &offset, count); + off_t soffset = offset; + res = sendfile (ofd, ifd, &soffset, count); -# elif __freebsd - /* - * Of course, the freebsd sendfile is a dire hack with no thoughts - * wasted on making it similar to other I/O functions. - */ - { - off_t sbytes; - res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); - - if (res < 0 && sbytes) - /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ - res = sbytes; - } +# elif __FreeBSD__ + /* + * Of course, the freebsd sendfile is a dire hack with no thoughts + * wasted on making it similar to other I/O functions. + */ + off_t sbytes; + res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); + + #if 0 /* according to the manpage, this is correct, but broken behaviour */ + /* freebsd' sendfile will return 0 on success */ + /* freebsd 8 documents it as only setting *sbytes on EINTR and EAGAIN, but */ + /* not on e.g. EIO or EPIPE - sounds broken */ + if ((res < 0 && (errno == EAGAIN || errno == EINTR) && sbytes) || res == 0) + res = sbytes; + #endif + + /* according to source inspection, this is correct, and useful behaviour */ + if (sbytes) + res = sbytes; + +# elif defined __APPLE__ + off_t sbytes = count; + res = sendfile (ifd, ofd, offset, &sbytes, 0, 0); + + /* according to the manpage, sbytes is always valid */ + if (sbytes) + res = sbytes; # elif __hpux - res = sendfile (ofd, ifd, offset, count, 0, 0); + res = sendfile (ofd, ifd, offset, count, 0, 0); # elif __solaris - { - struct sendfilevec vec; - size_t sbytes; + struct sendfilevec vec; + size_t sbytes; - vec.sfv_fd = ifd; - vec.sfv_flag = 0; - vec.sfv_off = offset; - vec.sfv_len = count; + vec.sfv_fd = ifd; + vec.sfv_flag = 0; + vec.sfv_off = offset; + vec.sfv_len = count; - res = sendfilev (ofd, &vec, 1, &sbytes); + res = sendfilev (ofd, &vec, 1, &sbytes); - if (res < 0 && sbytes) - res = sbytes; - } + if (res < 0 && sbytes) + res = sbytes; # endif + +#elif defined (_WIN32) && 0 + /* does not work, just for documentation of what would need to be done */ + /* actually, cannot be done like this, as TransmitFile changes the file offset, */ + /* libeio guarantees that the file offset does not change, and windows */ + /* has no way to get an independent handle to the same file description */ + HANDLE h = TO_SOCKET (ifd); + SetFilePointer (h, offset, 0, FILE_BEGIN); + res = TransmitFile (TO_SOCKET (ofd), h, count, 0, 0, 0, 0); + #else - res = -1; - errno = ENOSYS; + res = EIO_ENOSYS (); #endif - if (res < 0 + /* we assume sendfile can copy at least 128mb in one go */ + if (res <= 128 * 1024 * 1024) + { + if (res > 0) + written += res; + + if (written) + return written; + + break; + } + else + { + /* if we requested more, then probably the kernel was lazy */ + written += res; + offset += res; + count -= res; + + if (!count) + return written; + } + } + + if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK + /* BSDs */ +#ifdef ENOTSUP /* sigh, if the steenking pile called openbsd would only try to at least compile posix code... */ + || errno == ENOTSUP +#endif +#ifdef EOPNOTSUPP /* windows */ + || errno == EOPNOTSUPP /* BSDs */ +#endif #if __solaris || errno == EAFNOSUPPORT || errno == EPROTOTYPE #endif @@ -688,7 +1234,7 @@ while (count) { - ssize_t cnt; + eio_ssize_t cnt; cnt = pread (ifd, eio_buf, count > EIO_BUFSIZE ? EIO_BUFSIZE : count, offset); @@ -710,74 +1256,881 @@ res += cnt; count -= cnt; } + + FUBd; } return res; } +#ifdef PAGESIZE +# define eio_pagesize() PAGESIZE +#else +static intptr_t +eio_pagesize (void) +{ + static intptr_t page; + + if (!page) + page = sysconf (_SC_PAGESIZE); + + return page; +} +#endif + +static void +eio_page_align (void **addr, size_t *length) +{ + intptr_t mask = eio_pagesize () - 1; + + /* round down addr */ + intptr_t adj = mask & (intptr_t)*addr; + + *addr = (void *)((intptr_t)*addr - adj); + *length += adj; + + /* round up length */ + *length = (*length + mask) & ~mask; +} + +#if !_POSIX_MEMLOCK +# define eio__mlockall(a) EIO_ENOSYS () +#else + +static int +eio__mlockall (int flags) +{ + #if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7 + extern int mallopt (int, int); + mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */ + #endif + + if (EIO_MCL_CURRENT != MCL_CURRENT + || EIO_MCL_FUTURE != MCL_FUTURE) + { + flags = 0 + | (flags & EIO_MCL_CURRENT ? MCL_CURRENT : 0) + | (flags & EIO_MCL_FUTURE ? MCL_FUTURE : 0); + } + + return mlockall (flags); +} +#endif + +#if !_POSIX_MEMLOCK_RANGE +# define eio__mlock(a,b) EIO_ENOSYS () +#else + +static int +eio__mlock (void *addr, size_t length) +{ + eio_page_align (&addr, &length); + + return mlock (addr, length); +} + +#endif + +#if !(_POSIX_MAPPED_FILES && _POSIX_SYNCHRONIZED_IO) +# define eio__msync(a,b,c) EIO_ENOSYS () +#else + +static int +eio__msync (void *mem, size_t len, int flags) +{ + eio_page_align (&mem, &len); + + if (EIO_MS_ASYNC != MS_SYNC + || EIO_MS_INVALIDATE != MS_INVALIDATE + || EIO_MS_SYNC != MS_SYNC) + { + flags = 0 + | (flags & EIO_MS_ASYNC ? MS_ASYNC : 0) + | (flags & EIO_MS_INVALIDATE ? MS_INVALIDATE : 0) + | (flags & EIO_MS_SYNC ? MS_SYNC : 0); + } + + return msync (mem, len, flags); +} + +#endif + +static int +eio__mtouch (eio_req *req) +{ + void *mem = req->ptr2; + size_t len = req->size; + int flags = req->int1; + + eio_page_align (&mem, &len); + + { + intptr_t addr = (intptr_t)mem; + intptr_t end = addr + len; + intptr_t page = eio_pagesize (); + + if (addr < end) + if (flags & EIO_MT_MODIFY) /* modify */ + do { *((volatile sig_atomic_t *)addr) |= 0; } while ((addr += page) < len && !EIO_CANCELLED (req)); + else + do { *((volatile sig_atomic_t *)addr) ; } while ((addr += page) < len && !EIO_CANCELLED (req)); + } + + return 0; +} + +/*****************************************************************************/ +/* requests implemented outside eio_execute, because they are so large */ + +static void +eio__lseek (eio_req *req) +{ + /* this usually gets optimised away completely, or your compiler sucks, */ + /* or the whence constants really are not 0, 1, 2 */ + int whence = req->int2 == EIO_SEEK_SET ? SEEK_SET + : req->int2 == EIO_SEEK_CUR ? SEEK_CUR + : req->int2 == EIO_SEEK_END ? SEEK_END + : req->int2; + + req->offs = lseek (req->int1, req->offs, whence); + req->result = req->offs == (off_t)-1 ? -1 : 0; +} + +/* result will always end up in tmpbuf, there is always space for adding a 0-byte */ +static int +eio__realpath (struct tmpbuf *tmpbuf, eio_wd wd, const char *path) +{ + const char *rel = path; + char *res; + char *tmp1, *tmp2; +#if SYMLOOP_MAX > 32 + int symlinks = SYMLOOP_MAX; +#else + int symlinks = 32; +#endif + + errno = EINVAL; + if (!rel) + return -1; + + errno = ENOENT; + if (!*rel) + return -1; + + res = tmpbuf_get (tmpbuf, PATH_MAX * 3); + tmp1 = res + PATH_MAX; + tmp2 = tmp1 + PATH_MAX; + +#if 0 /* disabled, the musl way to do things is just too racy */ +#if __linux && defined(O_NONBLOCK) && defined(O_NOATIME) + /* on linux we may be able to ask the kernel */ + { + int fd = open (rel, O_RDONLY | O_NONBLOCK | O_NOCTTY | O_NOATIME); + + if (fd >= 0) + { + sprintf (tmp1, "/proc/self/fd/%d", fd); + req->result = readlink (tmp1, res, PATH_MAX); + close (fd); + + /* here we should probably stat the open file and the disk file, to make sure they still match */ + + if (req->result > 0) + goto done; + } + else if (errno == ELOOP || errno == ENAMETOOLONG || errno == ENOENT || errno == ENOTDIR || errno == EIO) + return; + } +#endif +#endif + + if (*rel != '/') + { + int len; + + errno = ENOENT; + if (wd == EIO_INVALID_WD) + return -1; + + if (wd == EIO_CWD) + { + if (!getcwd (res, PATH_MAX)) + return -1; + + len = strlen (res); + } + else + memcpy (res, wd->str, len = wd->len); + + if (res [1]) /* only use if not / */ + res += len; + } + + while (*rel) + { + eio_ssize_t len, linklen; + const char *beg = rel; + + while (*rel && *rel != '/') + ++rel; + + len = rel - beg; + + if (!len) /* skip slashes */ + { + ++rel; + continue; + } + + if (beg [0] == '.') + { + if (len == 1) + continue; /* . - nop */ + + if (beg [1] == '.' && len == 2) + { + /* .. - back up one component, if possible */ + + while (res != tmpbuf->ptr) + if (*--res == '/') + break; + + continue; + } + } + + errno = ENAMETOOLONG; + if (res + 1 + len + 1 >= tmp1) + return -1; + + /* copy one component */ + *res = '/'; + memcpy (res + 1, beg, len); + + /* zero-terminate, for readlink */ + res [len + 1] = 0; + + /* now check if it's a symlink */ + linklen = readlink (tmpbuf->ptr, tmp1, PATH_MAX); + + if (linklen < 0) + { + if (errno != EINVAL) + return -1; + + /* it's a normal directory. hopefully */ + res += len + 1; + } + else + { + /* yay, it was a symlink - build new path in tmp2 */ + int rellen = strlen (rel); + + errno = ENAMETOOLONG; + if (linklen + 1 + rellen >= PATH_MAX) + return -1; + + errno = ELOOP; + if (!--symlinks) + return -1; + + if (*tmp1 == '/') + res = tmpbuf->ptr; /* symlink resolves to an absolute path */ + + /* we need to be careful, as rel might point into tmp2 already */ + memmove (tmp2 + linklen + 1, rel, rellen + 1); + tmp2 [linklen] = '/'; + memcpy (tmp2, tmp1, linklen); + + rel = tmp2; + } + } + + /* special case for the lone root path */ + if (res == tmpbuf->ptr) + *res++ = '/'; + + return res - (char *)tmpbuf->ptr; +} + +static signed char +eio_dent_cmp (const eio_dirent *a, const eio_dirent *b) +{ + return a->score - b->score ? a->score - b->score /* works because our signed char is always 0..100 */ + : a->inode < b->inode ? -1 + : a->inode > b->inode ? 1 + : 0; +} + +#define EIO_DENT_CMP(i,op,j) eio_dent_cmp (&i, &j) op 0 + +#define EIO_SORT_CUTOFF 30 /* quite high, but performs well on many filesystems */ +#define EIO_SORT_FAST 60 /* when to only use insertion sort */ + +static void +eio_dent_radix_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) +{ + unsigned char bits [9 + sizeof (eio_ino_t) * 8]; + unsigned char *bit = bits; + + assert (CHAR_BIT == 8); + assert (sizeof (eio_dirent) * 8 < 256); + assert (offsetof (eio_dirent, inode)); /* we use bit #0 as sentinel */ + assert (offsetof (eio_dirent, score)); /* we use bit #0 as sentinel */ + + if (size <= EIO_SORT_FAST) + return; + + /* first prepare an array of bits to test in our radix sort */ + /* try to take endianness into account, as well as differences in eio_ino_t sizes */ + /* inode_bits must contain all inodes ORed together */ + /* which is used to skip bits that are 0 everywhere, which is very common */ + { + eio_ino_t endianness; + int i, j; + + /* we store the byte offset of byte n into byte n of "endianness" */ + for (i = 0; i < sizeof (eio_ino_t); ++i) + ((unsigned char *)&endianness)[i] = i; + + *bit++ = 0; + + for (i = 0; i < sizeof (eio_ino_t); ++i) + { + /* shifting off the byte offsets out of "endianness" */ + int offs = (offsetof (eio_dirent, inode) + (endianness & 0xff)) * 8; + endianness >>= 8; + + for (j = 0; j < 8; ++j) + if (inode_bits & (((eio_ino_t)1) << (i * 8 + j))) + *bit++ = offs + j; + } + + for (j = 0; j < 8; ++j) + if (score_bits & (1 << j)) + *bit++ = offsetof (eio_dirent, score) * 8 + j; + } + + /* now actually do the sorting (a variant of MSD radix sort) */ + { + eio_dirent *base_stk [9 + sizeof (eio_ino_t) * 8], *base; + eio_dirent *end_stk [9 + sizeof (eio_ino_t) * 8], *end; + unsigned char *bit_stk [9 + sizeof (eio_ino_t) * 8]; + int stk_idx = 0; + + base_stk [stk_idx] = dents; + end_stk [stk_idx] = dents + size; + bit_stk [stk_idx] = bit - 1; + + do + { + base = base_stk [stk_idx]; + end = end_stk [stk_idx]; + bit = bit_stk [stk_idx]; + + for (;;) + { + unsigned char O = *bit >> 3; + unsigned char M = 1 << (*bit & 7); + + eio_dirent *a = base; + eio_dirent *b = end; + + if (b - a < EIO_SORT_CUTOFF) + break; + + /* now bit-partition the array on the bit */ + /* this ugly asymmetric loop seems to perform much better than typical */ + /* partition algos found in the literature */ + do + if (!(((unsigned char *)a)[O] & M)) + ++a; + else if (!(((unsigned char *)--b)[O] & M)) + { + eio_dirent tmp = *a; *a = *b; *b = tmp; + ++a; + } + while (b > a); + + /* next bit, or stop, if no bits left in this path */ + if (!*--bit) + break; + + base_stk [stk_idx] = a; + end_stk [stk_idx] = end; + bit_stk [stk_idx] = bit; + ++stk_idx; + + end = a; + } + } + while (stk_idx--); + } +} + +static void +eio_dent_insertion_sort (eio_dirent *dents, int size) +{ + /* first move the smallest element to the front, to act as a sentinel */ + { + int i; + eio_dirent *min = dents; + + /* the radix pre-pass ensures that the minimum element is in the first EIO_SORT_CUTOFF + 1 elements */ + for (i = size > EIO_SORT_FAST ? EIO_SORT_CUTOFF + 1 : size; --i; ) + if (EIO_DENT_CMP (dents [i], <, *min)) + min = &dents [i]; + + /* swap elements 0 and j (minimum) */ + { + eio_dirent tmp = *dents; *dents = *min; *min = tmp; + } + } + + /* then do standard insertion sort, assuming that all elements are >= dents [0] */ + { + eio_dirent *i, *j; + + for (i = dents + 1; i < dents + size; ++i) + { + eio_dirent value = *i; + + for (j = i - 1; EIO_DENT_CMP (*j, >, value); --j) + j [1] = j [0]; + + j [1] = value; + } + } +} + +static void +eio_dent_sort (eio_dirent *dents, int size, signed char score_bits, eio_ino_t inode_bits) +{ + if (size <= 1) + return; /* our insertion sort relies on size > 0 */ + + /* first we use a radix sort, but only for dirs >= EIO_SORT_FAST */ + /* and stop sorting when the partitions are <= EIO_SORT_CUTOFF */ + eio_dent_radix_sort (dents, size, score_bits, inode_bits); + + /* use an insertion sort at the end, or for small arrays, */ + /* as insertion sort is more efficient for small partitions */ + eio_dent_insertion_sort (dents, size); +} + /* read a full directory */ static void -eio__scandir (eio_req *req, worker *self) +eio__scandir (eio_req *req, etp_worker *self) { + char *name, *names; + int namesalloc = 4096 - sizeof (void *) * 4; + int namesoffs = 0; + int flags = req->int1; + eio_dirent *dents = 0; + int dentalloc = 128; + int dentoffs = 0; + eio_ino_t inode_bits = 0; +#ifdef _WIN32 + HANDLE dirp; + WIN32_FIND_DATA entp; +#else DIR *dirp; - union - { - EIO_STRUCT_DIRENT d; - char b [offsetof (EIO_STRUCT_DIRENT, d_name) + NAME_MAX + 1]; - } *u; EIO_STRUCT_DIRENT *entp; - char *name, *names; - int memlen = 4096; - int memofs = 0; - int res = 0; +#endif - X_LOCK (wrklock); - self->dirp = dirp = opendir (req->ptr1); - self->dbuf = u = malloc (sizeof (*u)); - req->flags |= EIO_FLAG_PTR2_FREE; - req->ptr2 = names = malloc (memlen); - X_UNLOCK (wrklock); + req->result = -1; + + if (!(flags & EIO_READDIR_DENTS)) + flags &= ~(EIO_READDIR_DIRS_FIRST | EIO_READDIR_STAT_ORDER); + +#ifdef _WIN32 + { + int len = strlen ((const char *)req->ptr1); + char *path = malloc (MAX_PATH); + const char *fmt; + const char *reqpath = wd_expand (&self->tmpbuf, req->wd, req->ptr1); + + if (!len) + fmt = "./*"; + else if (reqpath[len - 1] == '/' || reqpath[len - 1] == '\\') + fmt = "%s*"; + else + fmt = "%s/*"; + + _snprintf (path, MAX_PATH, fmt, reqpath); + dirp = FindFirstFile (path, &entp); + free (path); + + if (dirp == INVALID_HANDLE_VALUE) + { + /* should steal _dosmaperr */ + switch (GetLastError ()) + { + case ERROR_FILE_NOT_FOUND: + req->result = 0; + break; + + case ERROR_INVALID_NAME: + case ERROR_PATH_NOT_FOUND: + case ERROR_NO_MORE_FILES: + errno = ENOENT; + break; + + case ERROR_NOT_ENOUGH_MEMORY: + errno = ENOMEM; + break; + + default: + errno = EINVAL; + break; + } - if (dirp && u && names) - for (;;) + return; + } + } +#else + #if HAVE_AT + if (req->wd) { - errno = 0; - readdir_r (dirp, &u->d, &entp); + int fd = openat (WD2FD (req->wd), req->ptr1, O_CLOEXEC | O_SEARCH | O_DIRECTORY); - if (!entp) - break; + if (fd < 0) + return; - name = entp->d_name; + dirp = fdopendir (fd); - if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) - { - int len = strlen (name) + 1; + if (!dirp) + close (fd); + } + else + dirp = opendir (req->ptr1); + #else + dirp = opendir (wd_expand (&self->tmpbuf, req->wd, req->ptr1)); + #endif + + if (!dirp) + return; +#endif - res++; + if (req->flags & EIO_FLAG_PTR1_FREE) + free (req->ptr1); - while (memofs + len > memlen) + req->flags |= EIO_FLAG_PTR1_FREE | EIO_FLAG_PTR2_FREE; + req->ptr1 = dents = flags ? malloc (dentalloc * sizeof (eio_dirent)) : 0; + req->ptr2 = names = malloc (namesalloc); + + if (!names || (flags && !dents)) + return; + + for (;;) + { + int done; + +#ifdef _WIN32 + done = !dirp; +#else + errno = 0; + entp = readdir (dirp); + done = !entp; +#endif + + if (done) + { +#ifndef _WIN32 + int old_errno = errno; + closedir (dirp); + errno = old_errno; + + if (errno) + break; +#endif + + /* sort etc. */ + req->int1 = flags; + req->result = dentoffs; + + if (flags & EIO_READDIR_STAT_ORDER) + eio_dent_sort (dents, dentoffs, flags & EIO_READDIR_DIRS_FIRST ? 7 : 0, inode_bits); + else if (flags & EIO_READDIR_DIRS_FIRST) + if (flags & EIO_READDIR_FOUND_UNKNOWN) + eio_dent_sort (dents, dentoffs, 7, inode_bits); /* sort by score and inode */ + else { - memlen *= 2; - X_LOCK (wrklock); - req->ptr2 = names = realloc (names, memlen); - X_UNLOCK (wrklock); + /* in this case, all is known, and we just put dirs first and sort them */ + eio_dirent *oth = dents + dentoffs; + eio_dirent *dir = dents; + + /* now partition dirs to the front, and non-dirs to the back */ + /* by walking from both sides and swapping if necessary */ + while (oth > dir) + { + if (dir->type == EIO_DT_DIR) + ++dir; + else if ((--oth)->type == EIO_DT_DIR) + { + eio_dirent tmp = *dir; *dir = *oth; *oth = tmp; - if (!names) - break; + ++dir; + } + } + + /* now sort the dirs only (dirs all have the same score) */ + eio_dent_sort (dents, dir - dents, 0, inode_bits); } - memcpy (names + memofs, name, len); - memofs += len; - } - } + break; + } - if (errno) - res = -1; - - req->result = res; + /* now add the entry to our list(s) */ + name = D_NAME (entp); + + /* skip . and .. entries */ + if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) + { + int len = D_NAMLEN (entp) + 1; + + while (ecb_expect_false (namesoffs + len > namesalloc)) + { + namesalloc *= 2; + req->ptr2 = names = realloc (names, namesalloc); + + if (!names) + break; + } + + memcpy (names + namesoffs, name, len); + + if (dents) + { + struct eio_dirent *ent; + + if (ecb_expect_false (dentoffs == dentalloc)) + { + dentalloc *= 2; + req->ptr1 = dents = realloc (dents, dentalloc * sizeof (eio_dirent)); + + if (!dents) + break; + } + + ent = dents + dentoffs; + + ent->nameofs = namesoffs; /* rather dirtily we store the offset in the pointer */ + ent->namelen = len - 1; + ent->inode = D_INO (entp); + + inode_bits |= ent->inode; + + switch (D_TYPE (entp)) + { + default: + ent->type = EIO_DT_UNKNOWN; + flags |= EIO_READDIR_FOUND_UNKNOWN; + break; + + #ifdef DT_FIFO + case DT_FIFO: ent->type = EIO_DT_FIFO; break; + #endif + #ifdef DT_CHR + case DT_CHR: ent->type = EIO_DT_CHR; break; + #endif + #ifdef DT_MPC + case DT_MPC: ent->type = EIO_DT_MPC; break; + #endif + #ifdef DT_DIR + case DT_DIR: ent->type = EIO_DT_DIR; break; + #endif + #ifdef DT_NAM + case DT_NAM: ent->type = EIO_DT_NAM; break; + #endif + #ifdef DT_BLK + case DT_BLK: ent->type = EIO_DT_BLK; break; + #endif + #ifdef DT_MPB + case DT_MPB: ent->type = EIO_DT_MPB; break; + #endif + #ifdef DT_REG + case DT_REG: ent->type = EIO_DT_REG; break; + #endif + #ifdef DT_NWK + case DT_NWK: ent->type = EIO_DT_NWK; break; + #endif + #ifdef DT_CMP + case DT_CMP: ent->type = EIO_DT_CMP; break; + #endif + #ifdef DT_LNK + case DT_LNK: ent->type = EIO_DT_LNK; break; + #endif + #ifdef DT_SOCK + case DT_SOCK: ent->type = EIO_DT_SOCK; break; + #endif + #ifdef DT_DOOR + case DT_DOOR: ent->type = EIO_DT_DOOR; break; + #endif + #ifdef DT_WHT + case DT_WHT: ent->type = EIO_DT_WHT; break; + #endif + } + + ent->score = 7; + + if (flags & EIO_READDIR_DIRS_FIRST) + { + if (ent->type == EIO_DT_UNKNOWN) + { + if (*name == '.') /* leading dots are likely directories, and, in any case, rare */ + ent->score = 1; + else if (!strchr (name, '.')) /* absence of dots indicate likely dirs */ + ent->score = len <= 2 ? 4 - len : len <= 4 ? 4 : len <= 7 ? 5 : 6; /* shorter == more likely dir, but avoid too many classes */ + } + else if (ent->type == EIO_DT_DIR) + ent->score = 0; + } + } + + namesoffs += len; + ++dentoffs; + } + + if (EIO_CANCELLED (req)) + { + errno = ECANCELED; + break; + } + +#ifdef _WIN32 + if (!FindNextFile (dirp, &entp)) + { + FindClose (dirp); + dirp = 0; + } +#endif + } } /*****************************************************************************/ +/* working directory stuff */ +/* various deficiencies in the posix 2008 api force us to */ +/* keep the absolute path in string form at all times */ +/* fuck yeah. */ + +#if !HAVE_AT + +/* a bit like realpath, but usually faster because it doesn'T have to return */ +/* an absolute or canonical path */ +static const char * +wd_expand (struct tmpbuf *tmpbuf, eio_wd wd, const char *path) +{ + if (!wd || *path == '/') + return path; + + if (path [0] == '.' && !path [1]) + return wd->str; + + { + int l1 = wd->len; + int l2 = strlen (path); + + char *res = tmpbuf_get (tmpbuf, l1 + l2 + 2); + + memcpy (res, wd->str, l1); + res [l1] = '/'; + memcpy (res + l1 + 1, path, l2 + 1); + + return res; + } +} + +#endif + +static eio_wd +eio__wd_open_sync (struct tmpbuf *tmpbuf, eio_wd wd, const char *path) +{ + int fd; + eio_wd res; + int len = eio__realpath (tmpbuf, wd, path); + + if (len < 0) + return EIO_INVALID_WD; + +#if HAVE_AT + fd = openat (WD2FD (wd), path, O_CLOEXEC | O_SEARCH | O_DIRECTORY); + + if (fd < 0) + return EIO_INVALID_WD; +#endif + + res = malloc (sizeof (*res) + len); /* one extra 0-byte */ + +#if HAVE_AT + res->fd = fd; +#endif + + res->len = len; + memcpy (res->str, tmpbuf->ptr, len); + res->str [len] = 0; + + return res; +} + +eio_wd +eio_wd_open_sync (eio_wd wd, const char *path) +{ + struct tmpbuf tmpbuf = { 0 }; + wd = eio__wd_open_sync (&tmpbuf, wd, path); + free (tmpbuf.ptr); + + return wd; +} + +void +eio_wd_close_sync (eio_wd wd) +{ + if (wd != EIO_INVALID_WD && wd != EIO_CWD) + { + #if HAVE_AT + close (wd->fd); + #endif + free (wd); + } +} + +#if HAVE_AT + +/* they forgot these */ + +static int +eio__truncateat (int dirfd, const char *path, off_t length) +{ + int fd = openat (dirfd, path, O_WRONLY | O_CLOEXEC); + int res; + + if (fd < 0) + return fd; + + res = ftruncate (fd, length); + close (fd); + return res; +} + +static int +eio__statvfsat (int dirfd, const char *path, struct statvfs *buf) +{ + int fd = openat (dirfd, path, O_SEARCH | O_CLOEXEC); + int res; + + if (fd < 0) + return fd; + + res = fstatvfs (fd, buf); + close (fd); + return res; + +} + +#endif + +/*****************************************************************************/ #define ALLOC(len) \ if (!req->ptr2) \ @@ -794,45 +2147,69 @@ } \ } -X_THREAD_PROC (eio_proc) +static void ecb_noinline ecb_cold +etp_proc_init (void) { - eio_req *req; +#if HAVE_PRCTL_SET_NAME + /* provide a more sensible "thread name" */ + char name[16 + 1]; + const int namelen = sizeof (name) - 1; + int len; + + prctl (PR_GET_NAME, (unsigned long)name, 0, 0, 0); + name [namelen] = 0; + len = strlen (name); + strcpy (name + (len <= namelen - 4 ? len : namelen - 4), "/eio"); + prctl (PR_SET_NAME, (unsigned long)name, 0, 0, 0); +#endif +} + +X_THREAD_PROC (etp_proc) +{ + ETP_REQ *req; struct timespec ts; - worker *self = (worker *)thr_arg; + etp_worker *self = (etp_worker *)thr_arg; + + etp_proc_init (); - /* try to distribute timeouts somewhat randomly */ + /* try to distribute timeouts somewhat evenly */ ts.tv_nsec = ((unsigned long)self & 1023UL) * (1000000000UL / 1024UL); for (;;) { - ts.tv_sec = time (0) + IDLE_TIMEOUT; + ts.tv_sec = 0; X_LOCK (reqlock); for (;;) { - self->req = req = reqq_shift (&req_queue); + req = reqq_shift (&req_queue); if (req) break; + if (ts.tv_sec == 1) /* no request, but timeout detected, let's quit */ + { + X_UNLOCK (reqlock); + X_LOCK (wrklock); + --started; + X_UNLOCK (wrklock); + goto quit; + } + ++idle; - if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) + if (idle <= max_idle) + /* we are allowed to idle, so do so without any timeout */ + X_COND_WAIT (reqwait, reqlock); + else { - if (idle > max_idle) - { - --idle; - X_UNLOCK (reqlock); - X_LOCK (wrklock); - --started; - X_UNLOCK (wrklock); - goto quit; - } + /* initialise timeout once */ + if (!ts.tv_sec) + ts.tv_sec = time (0) + idle_timeout; - /* we are allowed to idle, so do so without any timeout */ - X_COND_WAIT (reqwait, reqlock); - ts.tv_sec = time (0) + IDLE_TIMEOUT; + if (X_COND_TIMEDWAIT (reqwait, reqlock, ts) == ETIMEDOUT) + ts.tv_sec = 1; /* assuming this is not a value computed above.,.. */ } --idle; @@ -842,109 +2219,10 @@ X_UNLOCK (reqlock); - errno = 0; /* strictly unnecessary */ - - if (!EIO_CANCELLED (req)) - switch (req->type) - { - case EIO_READ: ALLOC (req->size); - req->result = req->offs >= 0 - ? pread (req->int1, req->ptr2, req->size, req->offs) - : read (req->int1, req->ptr2, req->size); break; - case EIO_WRITE: req->result = req->offs >= 0 - ? pwrite (req->int1, req->ptr2, req->size, req->offs) - : write (req->int1, req->ptr2, req->size); break; - - case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; - case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size, self); break; - - case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); - req->result = stat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; - case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); - req->result = lstat (req->ptr1, (EIO_STRUCT_STAT *)req->ptr2); break; - case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); - req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; - - case EIO_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break; - case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; - case EIO_CHMOD: req->result = chmod (req->ptr1, (mode_t)req->int2); break; - case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; - case EIO_TRUNCATE: req->result = truncate (req->ptr1, req->offs); break; - case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; - - case EIO_OPEN: req->result = open (req->ptr1, req->int1, (mode_t)req->int2); break; - case EIO_CLOSE: req->result = close (req->int1); break; - case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; - case EIO_UNLINK: req->result = unlink (req->ptr1); break; - case EIO_RMDIR: req->result = rmdir (req->ptr1); break; - case EIO_MKDIR: req->result = mkdir (req->ptr1, (mode_t)req->int2); break; - case EIO_RENAME: req->result = rename (req->ptr1, req->ptr2); break; - case EIO_LINK: req->result = link (req->ptr1, req->ptr2); break; - case EIO_SYMLINK: req->result = symlink (req->ptr1, req->ptr2); break; - case EIO_MKNOD: req->result = mknod (req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; - - case EIO_READLINK: ALLOC (NAME_MAX); - req->result = readlink (req->ptr1, req->ptr2, NAME_MAX); break; - - case EIO_SYNC: req->result = 0; sync (); break; - case EIO_FSYNC: req->result = fsync (req->int1); break; - case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; - - case EIO_READDIR: eio__scandir (req, self); break; - - case EIO_BUSY: -#ifdef _WIN32 - Sleep (req->nv1 * 1000.); -#else - { - struct timeval tv; - - tv.tv_sec = req->nv1; - tv.tv_usec = (req->nv1 - tv.tv_sec) * 1000000.; - - req->result = select (0, 0, 0, 0, &tv); - } -#endif - break; - - case EIO_UTIME: - case EIO_FUTIME: - { - struct timeval tv[2]; - struct timeval *times; - - if (req->nv1 != -1. || req->nv2 != -1.) - { - tv[0].tv_sec = req->nv1; - tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.; - tv[1].tv_sec = req->nv2; - tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.; - - times = tv; - } - else - times = 0; - - - req->result = req->type == EIO_FUTIME - ? futimes (req->int1, times) - : utimes (req->ptr1, times); - } - - case EIO_GROUP: - case EIO_NOP: - req->result = 0; - break; + if (req->type < 0) + goto quit; - case EIO_QUIT: - goto quit; - - default: - req->result = -1; - break; - } - - req->errorno = errno; + ETP_EXECUTE (self, req); X_LOCK (reslock); @@ -953,98 +2231,33 @@ if (!reqq_push (&res_queue, req) && want_poll_cb) want_poll_cb (); - self->req = 0; - worker_clear (self); + etp_worker_clear (self); X_UNLOCK (reslock); } quit: + free (req); + X_LOCK (wrklock); - worker_free (self); + etp_worker_free (self); X_UNLOCK (wrklock); - - return 0; } /*****************************************************************************/ -static void eio_atfork_prepare (void) +int ecb_cold +eio_init (void (*want_poll)(void), void (*done_poll)(void)) { - X_LOCK (wrklock); - X_LOCK (reqlock); - X_LOCK (reslock); #if !HAVE_PREADWRITE - X_LOCK (preadwritelock); -#endif -#if !HAVE_READDIR_R - X_LOCK (readdirlock); + X_MUTEX_CREATE (preadwritelock); #endif -} -static void eio_atfork_parent (void) -{ -#if !HAVE_READDIR_R - X_UNLOCK (readdirlock); -#endif -#if !HAVE_PREADWRITE - X_UNLOCK (preadwritelock); -#endif - X_UNLOCK (reslock); - X_UNLOCK (reqlock); - X_UNLOCK (wrklock); + return etp_init (want_poll, done_poll); } -static void eio_atfork_child (void) -{ - eio_req *prv; - - while (prv = reqq_shift (&req_queue)) - eio_destroy (prv); - - while (prv = reqq_shift (&res_queue)) - eio_destroy (prv); - - while (wrk_first.next != &wrk_first) - { - worker *wrk = wrk_first.next; - - if (wrk->req) - eio_destroy (wrk->req); - - worker_clear (wrk); - worker_free (wrk); - } - - started = 0; - idle = 0; - nreqs = 0; - nready = 0; - npending = 0; - - eio_atfork_parent (); -} - -int eio_init (void (*want_poll)(void), void (*done_poll)(void)) -{ - want_poll_cb = want_poll; - done_poll_cb = done_poll; - -#ifdef _WIN32 - X_MUTEX_CHECK (wrklock); - X_MUTEX_CHECK (reslock); - X_MUTEX_CHECK (reqlock); - X_MUTEX_CHECK (reqwait); - X_MUTEX_CHECK (preadwritelock); - X_MUTEX_CHECK (readdirlock); - - X_COND_CHECK (reqwait); -#endif - - X_THREAD_ATFORK (eio_atfork_prepare, eio_atfork_parent, eio_atfork_child); -} - -static void eio_api_destroy (eio_req *req) +ecb_inline void +eio_api_destroy (eio_req *req) { free (req); } @@ -1073,8 +2286,231 @@ return 0; \ } +static void +eio_execute (etp_worker *self, eio_req *req) +{ +#if HAVE_AT + int dirfd; +#else + const char *path; +#endif + + if (ecb_expect_false (EIO_CANCELLED (req))) + { + req->result = -1; + req->errorno = ECANCELED; + return; + } + + if (ecb_expect_false (req->wd == EIO_INVALID_WD)) + { + req->result = -1; + req->errorno = ENOENT; + return; + } + + if (req->type >= EIO_OPEN) + { + #if HAVE_AT + dirfd = WD2FD (req->wd); + #else + path = wd_expand (&self->tmpbuf, req->wd, req->ptr1); + #endif + } + + switch (req->type) + { + case EIO_WD_OPEN: req->wd = eio__wd_open_sync (&self->tmpbuf, req->wd, req->ptr1); + req->result = req->wd == EIO_INVALID_WD ? -1 : 0; + break; + case EIO_WD_CLOSE: req->result = 0; + eio_wd_close_sync (req->wd); break; + + case EIO_SEEK: eio__lseek (req); break; + case EIO_READ: ALLOC (req->size); + req->result = req->offs >= 0 + ? pread (req->int1, req->ptr2, req->size, req->offs) + : read (req->int1, req->ptr2, req->size); break; + case EIO_WRITE: req->result = req->offs >= 0 + ? pwrite (req->int1, req->ptr2, req->size, req->offs) + : write (req->int1, req->ptr2, req->size); break; + + case EIO_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break; + case EIO_SENDFILE: req->result = eio__sendfile (req->int1, req->int2, req->offs, req->size); break; + +#if HAVE_AT + + case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); + req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, 0); break; + case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); + req->result = fstatat (dirfd, req->ptr1, (EIO_STRUCT_STAT *)req->ptr2, AT_SYMLINK_NOFOLLOW); break; + case EIO_CHOWN: req->result = fchownat (dirfd, req->ptr1, req->int2, req->int3, 0); break; + case EIO_CHMOD: req->result = fchmodat (dirfd, req->ptr1, (mode_t)req->int2, 0); break; + case EIO_TRUNCATE: req->result = eio__truncateat (dirfd, req->ptr1, req->offs); break; + case EIO_OPEN: req->result = openat (dirfd, req->ptr1, req->int1, (mode_t)req->int2); break; + + case EIO_UNLINK: req->result = unlinkat (dirfd, req->ptr1, 0); break; + case EIO_RMDIR: req->result = unlinkat (dirfd, req->ptr1, AT_REMOVEDIR); break; + case EIO_MKDIR: req->result = mkdirat (dirfd, req->ptr1, (mode_t)req->int2); break; + case EIO_RENAME: req->result = renameat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2); break; + case EIO_LINK: req->result = linkat (dirfd, req->ptr1, WD2FD ((eio_wd)req->int3), req->ptr2, 0); break; + case EIO_SYMLINK: req->result = symlinkat (req->ptr1, dirfd, req->ptr2); break; + case EIO_MKNOD: req->result = mknodat (dirfd, req->ptr1, (mode_t)req->int2, (dev_t)req->offs); break; + case EIO_READLINK: ALLOC (PATH_MAX); + req->result = readlinkat (dirfd, req->ptr1, req->ptr2, PATH_MAX); break; + case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); + req->result = eio__statvfsat (dirfd, req->ptr1, (EIO_STRUCT_STATVFS *)req->ptr2); break; + case EIO_UTIME: + case EIO_FUTIME: + { + struct timespec ts[2]; + struct timespec *times; + + if (req->nv1 != -1. || req->nv2 != -1.) + { + ts[0].tv_sec = req->nv1; + ts[0].tv_nsec = (req->nv1 - ts[0].tv_sec) * 1e9; + ts[1].tv_sec = req->nv2; + ts[1].tv_nsec = (req->nv2 - ts[1].tv_sec) * 1e9; + + times = ts; + } + else + times = 0; + + req->result = req->type == EIO_FUTIME + ? futimens (req->int1, times) + : utimensat (dirfd, req->ptr1, times, 0); + } + break; + +#else + + case EIO_STAT: ALLOC (sizeof (EIO_STRUCT_STAT)); + req->result = stat (path , (EIO_STRUCT_STAT *)req->ptr2); break; + case EIO_LSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); + req->result = lstat (path , (EIO_STRUCT_STAT *)req->ptr2); break; + case EIO_CHOWN: req->result = chown (path , req->int2, req->int3); break; + case EIO_CHMOD: req->result = chmod (path , (mode_t)req->int2); break; + case EIO_TRUNCATE: req->result = truncate (path , req->offs); break; + case EIO_OPEN: req->result = open (path , req->int1, (mode_t)req->int2); break; + + case EIO_UNLINK: req->result = unlink (path ); break; + case EIO_RMDIR: req->result = rmdir (path ); break; + case EIO_MKDIR: req->result = mkdir (path , (mode_t)req->int2); break; + case EIO_RENAME: req->result = rename (path , req->ptr2); break; + case EIO_LINK: req->result = link (path , req->ptr2); break; + case EIO_SYMLINK: req->result = symlink (path , req->ptr2); break; + case EIO_MKNOD: req->result = mknod (path , (mode_t)req->int2, (dev_t)req->offs); break; + case EIO_READLINK: ALLOC (PATH_MAX); + req->result = readlink (path, req->ptr2, PATH_MAX); break; + case EIO_STATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); + req->result = statvfs (path , (EIO_STRUCT_STATVFS *)req->ptr2); break; + + case EIO_UTIME: + case EIO_FUTIME: + { + struct timeval tv[2]; + struct timeval *times; + + if (req->nv1 != -1. || req->nv2 != -1.) + { + tv[0].tv_sec = req->nv1; + tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1e6; + tv[1].tv_sec = req->nv2; + tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1e6; + + times = tv; + } + else + times = 0; + + req->result = req->type == EIO_FUTIME + ? futimes (req->int1, times) + : utimes (req->ptr1, times); + } + break; + +#endif + + case EIO_REALPATH: if (0 <= (req->result = eio__realpath (&self->tmpbuf, req->wd, req->ptr1))) + { + ALLOC (req->result); + memcpy (req->ptr2, self->tmpbuf.ptr, req->result); + } + break; + + case EIO_FSTAT: ALLOC (sizeof (EIO_STRUCT_STAT)); + req->result = fstat (req->int1, (EIO_STRUCT_STAT *)req->ptr2); break; + + case EIO_FSTATVFS: ALLOC (sizeof (EIO_STRUCT_STATVFS)); + req->result = fstatvfs (req->int1, (EIO_STRUCT_STATVFS *)req->ptr2); break; + + case EIO_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break; + case EIO_FCHMOD: req->result = fchmod (req->int1, (mode_t)req->int2); break; + case EIO_FTRUNCATE: req->result = ftruncate (req->int1, req->offs); break; + + case EIO_CLOSE: req->result = close (req->int1); break; + case EIO_DUP2: req->result = dup2 (req->int1, req->int2); break; + case EIO_SYNC: req->result = 0; sync (); break; + case EIO_FSYNC: req->result = fsync (req->int1); break; + case EIO_FDATASYNC: req->result = fdatasync (req->int1); break; + case EIO_SYNCFS: req->result = eio__syncfs (req->int1); break; + case EIO_SYNC_FILE_RANGE: req->result = eio__sync_file_range (req->int1, req->offs, req->size, req->int2); break; + case EIO_MSYNC: req->result = eio__msync (req->ptr2, req->size, req->int1); break; + case EIO_MTOUCH: req->result = eio__mtouch (req); break; + case EIO_MLOCK: req->result = eio__mlock (req->ptr2, req->size); break; + case EIO_MLOCKALL: req->result = eio__mlockall (req->int1); break; + case EIO_FALLOCATE: req->result = eio__fallocate (req->int1, req->int2, req->offs, req->size); break; + + case EIO_READDIR: eio__scandir (req, self); break; + + case EIO_BUSY: +#ifdef _WIN32 + Sleep (req->nv1 * 1e3); +#else + { + struct timeval tv; + + tv.tv_sec = req->nv1; + tv.tv_usec = (req->nv1 - tv.tv_sec) * 1e6; + + req->result = select (0, 0, 0, 0, &tv); + } +#endif + break; + + case EIO_GROUP: + abort (); /* handled in eio_request */ + + case EIO_NOP: + req->result = 0; + break; + + case EIO_CUSTOM: + req->feed (req); + break; + + default: + req->result = EIO_ENOSYS (); + break; + } + + req->errorno = errno; +} + #ifndef EIO_NO_WRAPPERS +eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data) +{ + REQ (EIO_WD_OPEN); PATH; SEND; +} + +eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data) +{ + REQ (EIO_WD_CLOSE); req->wd = wd; SEND; +} + eio_req *eio_nop (int pri, eio_cb cb, void *data) { REQ (EIO_NOP); SEND; @@ -1095,11 +2531,46 @@ REQ (EIO_FSYNC); req->int1 = fd; SEND; } +eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) +{ + REQ (EIO_MSYNC); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; +} + eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_FDATASYNC); req->int1 = fd; SEND; } +eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data) +{ + REQ (EIO_SYNCFS); req->int1 = fd; SEND; +} + +eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data) +{ + REQ (EIO_SYNC_FILE_RANGE); req->int1 = fd; req->offs = offset; req->size = nbytes; req->int2 = flags; SEND; +} + +eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data) +{ + REQ (EIO_MTOUCH); req->ptr2 = addr; req->size = length; req->int1 = flags; SEND; +} + +eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data) +{ + REQ (EIO_MLOCK); req->ptr2 = addr; req->size = length; SEND; +} + +eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data) +{ + REQ (EIO_MLOCKALL); req->int1 = flags; SEND; +} + +eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data) +{ + REQ (EIO_FALLOCATE); req->int1 = fd; req->int2 = mode; req->offs = offset; req->size = len; SEND; +} + eio_req *eio_close (int fd, int pri, eio_cb cb, void *data) { REQ (EIO_CLOSE); req->int1 = fd; SEND; @@ -1110,6 +2581,11 @@ REQ (EIO_READAHEAD); req->int1 = fd; req->offs = offset; req->size = length; SEND; } +eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data) +{ + REQ (EIO_SEEK); req->int1 = fd; req->offs = offset; req->int2 = whence; SEND; +} + eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data) { REQ (EIO_READ); req->int1 = fd; req->offs = offset; req->size = length; req->ptr2 = buf; SEND; @@ -1125,6 +2601,11 @@ REQ (EIO_FSTAT); req->int1 = fd; SEND; } +eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data) +{ + REQ (EIO_FSTATVFS); req->int1 = fd; SEND; +} + eio_req *eio_futime (int fd, double atime, double mtime, int pri, eio_cb cb, void *data) { REQ (EIO_FUTIME); req->int1 = fd; req->nv1 = atime; req->nv2 = mtime; SEND; @@ -1140,7 +2621,7 @@ REQ (EIO_FCHMOD); req->int1 = fd; req->int2 = (long)mode; SEND; } -eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) +eio_req *eio_fchown (int fd, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) { REQ (EIO_FCHOWN); req->int1 = fd; req->int2 = (long)uid; req->int3 = (long)gid; SEND; } @@ -1170,7 +2651,7 @@ REQ (EIO_TRUNCATE); PATH; req->offs = offset; SEND; } -eio_req *eio_chown (const char *path, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data) +eio_req *eio_chown (const char *path, eio_uid_t uid, eio_gid_t gid, int pri, eio_cb cb, void *data) { REQ (EIO_CHOWN); PATH; req->int2 = (long)uid; req->int3 = (long)gid; SEND; } @@ -1196,6 +2677,11 @@ return eio__1path (EIO_READLINK, path, pri, cb, data); } +eio_req *eio_realpath (const char *path, int pri, eio_cb cb, void *data) +{ + return eio__1path (EIO_REALPATH, path, pri, cb, data); +} + eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_STAT, path, pri, cb, data); @@ -1206,6 +2692,11 @@ return eio__1path (EIO_LSTAT, path, pri, cb, data); } +eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data) +{ + return eio__1path (EIO_STATVFS, path, pri, cb, data); +} + eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data) { return eio__1path (EIO_UNLINK, path, pri, cb, data); @@ -1216,14 +2707,14 @@ return eio__1path (EIO_RMDIR, path, pri, cb, data); } -eio_req *eio_readdir (const char *path, int pri, eio_cb cb, void *data) +eio_req *eio_readdir (const char *path, int flags, int pri, eio_cb cb, void *data) { - return eio__1path (EIO_READDIR, path, pri, cb, data); + REQ (EIO_READDIR); PATH; req->int1 = flags; SEND; } eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data) { - REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->int2 = (long)dev; SEND; + REQ (EIO_MKNOD); PATH; req->int2 = (long)mode; req->offs = (off_t)dev; SEND; } static eio_req * @@ -1257,6 +2748,11 @@ return eio__2path (EIO_RENAME, path, new_path, pri, cb, data); } +eio_req *eio_custom (void (*execute)(eio_req *), int pri, eio_cb cb, void *data) +{ + REQ (EIO_CUSTOM); req->feed = execute; SEND; +} + #endif eio_req *eio_grp (eio_cb cb, void *data) @@ -1273,7 +2769,8 @@ /*****************************************************************************/ /* grp functions */ -void eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) +void +eio_grp_feed (eio_req *grp, void (*feed)(eio_req *req), int limit) { grp->int2 = limit; grp->feed = feed; @@ -1281,17 +2778,21 @@ grp_try_feed (grp); } -void eio_grp_limit (eio_req *grp, int limit) +void +eio_grp_limit (eio_req *grp, int limit) { grp->int2 = limit; grp_try_feed (grp); } -void eio_grp_add (eio_req *grp, eio_req *req) +void +eio_grp_add (eio_req *grp, eio_req *req) { assert (("cannot add requests to IO::AIO::GRP after the group finished", grp->int1 != 2)); + grp->flags |= EIO_FLAG_GROUPADD; + ++grp->size; req->grp = grp; @@ -1307,15 +2808,9 @@ /*****************************************************************************/ /* misc garbage */ -ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) +eio_ssize_t +eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count) { - worker wrk; - - wrk.dbuf = 0; - - eio__sendfile (ofd, ifd, offset, count, &wrk); - - if (wrk.dbuf) - free (wrk.dbuf); + return eio__sendfile (ofd, ifd, offset, count); }