--- IO-AIO/AIO.xs 2005/07/23 18:19:56 1.15 +++ IO-AIO/AIO.xs 2005/08/16 22:22:18 1.22 @@ -1,7 +1,12 @@ +#define _REENTRANT 1 +#include + #include "EXTERN.h" #include "perl.h" #include "XSUB.h" +#include "autoconf/config.h" + #include #include @@ -9,9 +14,6 @@ #include #include #include -#if __linux -#include -#endif #include @@ -29,8 +31,10 @@ REQ_QUIT, REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, REQ_READAHEAD, - REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, + REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_FSYNC, REQ_FDATASYNC, + REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK, + REQ_SYMLINK, }; typedef struct aio_cb { @@ -45,7 +49,7 @@ mode_t mode; /* open */ int errorno; SV *data, *callback, *fh; - void *dataptr; + void *dataptr, *data2ptr; STRLEN dataoffset; Stat_t *statdata; @@ -60,6 +64,7 @@ static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; +static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER; static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; static volatile aio_req reqs, reqe; /* queue start, queue end */ @@ -90,7 +95,7 @@ { /* read any signals sent by the worker threads */ char buf [32]; - while (read (respipe [0], buf, 32) > 0) + while (read (respipe [0], buf, 32) == 32) ; } @@ -233,6 +238,153 @@ send_req (req); } + +static void min_parallel (int nthreads) +{ + while (nthreads > started) + start_thread (); +} + +static void max_parallel (int nthreads) +{ + int cur = started; + while (cur > nthreads) + { + end_thread (); + cur--; + } + + while (started > nthreads) + { + poll_wait (); + poll_cb (); + } +} + +static int fork_started; + +static void atfork_prepare (void) +{ + pthread_mutex_lock (&frklock); + + fork_started = started; + + for (;;) { + while (nreqs) + { + poll_wait (); + poll_cb (); + } + + max_parallel (0); + + pthread_mutex_lock (&reqlock); + + if (!nreqs && !started) + break; + + pthread_mutex_unlock (&reqlock); + + min_parallel (fork_started); + } + + pthread_mutex_lock (&reslock); + + assert (!started); + assert (!nreqs); + assert (!reqs && !reqe); + assert (!ress && !rese); +} + +static void atfork_parent (void) +{ + pthread_mutex_unlock (&reslock); + min_parallel (fork_started); + pthread_mutex_unlock (&reqlock); + pthread_mutex_unlock (&frklock); +} + +static void atfork_child (void) +{ + reqs = reqe = 0; + + atfork_parent (); +} + +/*****************************************************************************/ +/* work around various missing functions */ + +#if !HAVE_PREADWRITE +# define pread aio_pread +# define pwrite aio_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 pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; + +static ssize_t +pread (int fd, void *buf, size_t count, off_t offset) +{ + ssize_t res; + off_t ooffset; + + pthread_mutex_lock (&iolock); + ooffset = lseek (fd, 0, SEEK_CUR); + lseek (fd, offset, SEEK_SET); + res = read (fd, buf, count); + lseek (fd, ooffset, SEEK_SET); + pthread_mutex_unlock (&iolock); + + return res; +} + +static ssize_t +pwrite (int fd, void *buf, size_t count, off_t offset) +{ + ssize_t res; + off_t ooffset; + + pthread_mutex_lock (&iolock); + ooffset = lseek (fd, 0, SEEK_CUR); + lseek (fd, offset, SEEK_SET); + res = write (fd, buf, count); + lseek (fd, offset, SEEK_SET); + pthread_mutex_unlock (&iolock); + + return res; +} +#endif + +#if !HAVE_FDATASYNC +# define fdatasync fsync +#endif + +#if !HAVE_READAHEAD +# define readahead aio_readahead + +static char readahead_buf[4096]; + +static ssize_t +readahead (int fd, off_t offset, size_t count) +{ + while (count > 0) + { + size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); + + pread (fd, readahead_buf, len, offset); + offset += len; + count -= len; + } + + errno = 0; +} +#endif + +/*****************************************************************************/ + static void * aio_proc (void *thr_arg) { @@ -269,11 +421,8 @@ { case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; -#if SYS_readahead + case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; -#else - case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; -#endif case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; @@ -282,9 +431,11 @@ case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; case REQ_CLOSE: req->result = close (req->fd); break; case REQ_UNLINK: req->result = unlink (req->dataptr); break; + case REQ_RMDIR: req->result = rmdir (req->dataptr); break; + case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; - case REQ_FSYNC: req->result = fsync (req->fd); break; case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; + case REQ_FSYNC: req->result = fsync (req->fd); break; case REQ_QUIT: break; @@ -320,6 +471,18 @@ return 0; } +#define dREQ \ + aio_req req; \ + \ + if (SvOK (callback) && !SvROK (callback)) \ + croak ("clalback must be undef or of reference type"); \ + \ + Newz (0, req, 1, aio_cb); \ + if (!req) \ + croak ("out of memory during aio_req allocation"); \ + \ + req->callback = SvREFCNT_inc (callback); + MODULE = IO::AIO PACKAGE = IO::AIO PROTOTYPES: ENABLE @@ -334,35 +497,19 @@ if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) croak ("cannot set result pipe to nonblocking mode"); + + pthread_atfork (atfork_prepare, atfork_parent, atfork_child); } void min_parallel(nthreads) int nthreads PROTOTYPE: $ - CODE: - while (nthreads > started) - start_thread (); void max_parallel(nthreads) int nthreads PROTOTYPE: $ - CODE: -{ - int cur = started; - while (cur > nthreads) - { - end_thread (); - cur--; - } - - while (started > nthreads) - { - poll_wait (); - poll_cb (); - } -} int max_outstanding(nreqs) @@ -381,19 +528,13 @@ PROTOTYPE: $$$;$ CODE: { - aio_req req; - - Newz (0, req, 1, aio_cb); - - if (!req) - croak ("out of memory during aio_req allocation"); + dREQ; req->type = REQ_OPEN; req->data = newSVsv (pathname); - req->dataptr = SvPV_nolen (req->data); + req->dataptr = SvPVbyte_nolen (req->data); req->fd = flags; req->mode = mode; - req->callback = SvREFCNT_inc (callback); send_req (req); } @@ -409,17 +550,11 @@ aio_fdatasync = REQ_FDATASYNC CODE: { - aio_req req; - - Newz (0, req, 1, aio_cb); - - if (!req) - croak ("out of memory during aio_req allocation"); + dREQ; req->type = ix; req->fh = newSVsv (fh); req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); - req->callback = SvREFCNT_inc (callback); send_req (req); } @@ -440,7 +575,7 @@ { aio_req req; STRLEN svlen; - char *svptr = SvPV (data, svlen); + char *svptr = SvPVbyte (data, svlen); SvUPGRADE (data, SVt_PV); SvPOK_on (data); @@ -466,22 +601,21 @@ if (length < 0) croak ("length must not be negative"); - Newz (0, req, 1, aio_cb); - - if (!req) - croak ("out of memory during aio_req allocation"); + { + dREQ; - req->type = ix; - req->fh = newSVsv (fh); - req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) - : IoOFP (sv_2io (fh))); - req->offset = offset; - req->length = length; - req->data = SvREFCNT_inc (data); - req->dataptr = (char *)svptr + dataoffset; - req->callback = SvREFCNT_inc (callback); + req->type = ix; + req->fh = newSVsv (fh); + req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) + : IoOFP (sv_2io (fh))); + req->offset = offset; + req->length = length; + req->data = SvREFCNT_inc (data); + req->dataptr = (char *)svptr + dataoffset; + req->callback = SvREFCNT_inc (callback); - send_req (req); + send_req (req); + } } void @@ -493,22 +627,13 @@ PROTOTYPE: $$$;$ CODE: { - aio_req req; - - if (length < 0) - croak ("length must not be negative"); - - Newz (0, req, 1, aio_cb); - - if (!req) - croak ("out of memory during aio_req allocation"); + dREQ; req->type = REQ_READAHEAD; req->fh = newSVsv (fh); req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); req->offset = offset; req->length = length; - req->callback = SvREFCNT_inc (callback); send_req (req); } @@ -522,23 +647,17 @@ aio_lstat = REQ_LSTAT CODE: { - aio_req req; - - Newz (0, req, 1, aio_cb); - - if (!req) - croak ("out of memory during aio_req allocation"); + dREQ; New (0, req->statdata, 1, Stat_t); - if (!req->statdata) - croak ("out of memory during aio_req->statdata allocation"); + croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); if (SvPOK (fh_or_path)) { req->type = ix; req->data = newSVsv (fh_or_path); - req->dataptr = SvPV_nolen (req->data); + req->dataptr = SvPVbyte_nolen (req->data); } else { @@ -547,8 +666,6 @@ req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); } - req->callback = SvREFCNT_inc (callback); - send_req (req); } @@ -556,19 +673,34 @@ aio_unlink(pathname,callback=&PL_sv_undef) SV * pathname SV * callback + ALIAS: + aio_unlink = REQ_UNLINK + aio_rmdir = REQ_RMDIR CODE: { - aio_req req; + dREQ; - Newz (0, req, 1, aio_cb); + req->type = ix; + req->data = newSVsv (pathname); + req->dataptr = SvPVbyte_nolen (req->data); - if (!req) - croak ("out of memory during aio_req allocation"); + send_req (req); +} + +void +aio_symlink(oldpath,newpath,callback=&PL_sv_undef) + SV * oldpath + SV * newpath + SV * callback + CODE: +{ + dREQ; - req->type = REQ_UNLINK; - req->data = newSVsv (pathname); - req->dataptr = SvPV_nolen (req->data); - req->callback = SvREFCNT_inc (callback); + req->type = REQ_SYMLINK; + req->fh = newSVsv (oldpath); + req->data2ptr = SvPVbyte_nolen (req->fh); + req->data = newSVsv (newpath); + req->dataptr = SvPVbyte_nolen (req->data); send_req (req); }