--- Linux-AIO/AIO.xs 2001/08/14 03:18:53 1.1 +++ Linux-AIO/AIO.xs 2005/06/29 15:22:36 1.22 @@ -1,68 +1,364 @@ +#define PERL_NO_GET_CONTEXT + #include "EXTERN.h" #include "perl.h" #include "XSUB.h" #include +#include #include +#include +#include #include -#define STACKSIZE 128 /* yeah */ - -#define REQ_EXIT 0 -#define REQ_READ 1 -#define REQ_WRITE 2 +typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ +typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ +typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ + +#define STACKSIZE (128 * sizeof (long)) /* yeah */ + +enum { + REQ_QUIT, + REQ_OPEN, REQ_CLOSE, REQ_READ, REQ_WRITE, + REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK +}; typedef struct { char stack[STACKSIZE]; } aio_thread; -typedef struct { +typedef struct aio_cb { + struct aio_cb *next; + int type; aio_thread *thread; -/* read/write */ int fd; off_t offset; size_t length; - ssize_t done; + ssize_t result; + mode_t mode; /* open */ int errorno; - - SV *data; + SV *data, *callback; void *dataptr; - STRLEN offset; + STRLEN dataoffset; + + Stat_t *statdata; } aio_cb; typedef aio_cb *aio_req; static int started; +static int nreqs; static int reqpipe[2], respipe[2]; +static aio_req qs, qe; /* queue start, queue end */ + +static int aio_proc(void *arg); + static void -start_thread(void) +start_thread (void) { - aio_thread *thr = NEW ( - __clone (aio_proc, + aio_thread *thr; + + New (0, thr, 1, aio_thread); + + if (clone (aio_proc, + &(thr->stack[STACKSIZE - sizeof (long)]), + CLONE_VM|CLONE_FS|CLONE_FILES, + thr) >= 0) + started++; + else + Safefree (thr); } static void -end_thread(void) +send_reqs (void) { - aio_req req = 0; - write (reqpipe[1], &req, sizeof (aio_req)); - nthreads--; + /* this write is atomic */ + while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) + { + qs = qs->next; + if (!qs) qe = 0; + } +} + +static void +send_req (aio_req req) +{ + nreqs++; + req->next = 0; + + if (qe) + { + qe->next = req; + qe = req; + } + else + qe = qs = req; + + send_reqs (); +} + +static void +end_thread (void) +{ + aio_req req; + New (0, req, 1, aio_cb); + req->type = REQ_QUIT; + + send_req (req); +} + +static void +read_write (pTHX_ + int dowrite, int fd, off_t offset, size_t length, + SV *data, STRLEN dataoffset, SV *callback) +{ + aio_req req; + STRLEN svlen; + char *svptr = SvPV (data, svlen); + + SvUPGRADE (data, SVt_PV); + SvPOK_on (data); + + if (dataoffset < 0) + dataoffset += svlen; + + if (dataoffset < 0 || dataoffset > svlen) + croak ("data offset outside of string"); + + if (dowrite) + { + /* write: check length and adjust. */ + if (length < 0 || length + dataoffset > svlen) + length = svlen - dataoffset; + } + else + { + /* read: grow scalar as necessary */ + svptr = SvGROW (data, length + dataoffset); + } + + 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"); + + req->type = dowrite ? REQ_WRITE : REQ_READ; + req->fd = fd; + req->offset = offset; + req->length = length; + req->data = SvREFCNT_inc (data); + req->dataptr = (char *)svptr + dataoffset; + req->callback = SvREFCNT_inc (callback); + + send_req (req); +} + +static void +poll_wait () +{ + fd_set rfd; + FD_ZERO(&rfd); + FD_SET(respipe[0], &rfd); + + select (respipe[0] + 1, &rfd, 0, 0, 0); +} + +static int +poll_cb (pTHX) +{ + dSP; + int count = 0; + aio_req req; + + while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) + { + nreqs--; + + if (req->type == REQ_QUIT) + { + Safefree (req->thread); + started--; + } + else + { + int errorno = errno; + errno = req->errorno; + + if (req->type == REQ_READ) + SvCUR_set (req->data, req->dataoffset + + req->result > 0 ? req->result : 0); + + if (req->data) + SvREFCNT_dec (req->data); + + if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) + { + PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; + PL_laststatval = req->result; + PL_statcache = *(req->statdata); + + Safefree (req->statdata); + } + + PUSHMARK (SP); + XPUSHs (sv_2mortal (newSViv (req->result))); + PUTBACK; + call_sv (req->callback, G_VOID); + SPAGAIN; + + if (req->callback) + SvREFCNT_dec (req->callback); + + errno = errorno; + count++; + } + + Safefree (req); + } + + if (qs) + send_reqs (); + + return count; +} + +static sigset_t fullsigset; + +#undef errno +#include +#include + +#define COPY_STATDATA \ + req->statdata->st_dev = statdata.st_dev; \ + req->statdata->st_ino = statdata.st_ino; \ + req->statdata->st_mode = statdata.st_mode; \ + req->statdata->st_nlink = statdata.st_nlink; \ + req->statdata->st_uid = statdata.st_uid; \ + req->statdata->st_gid = statdata.st_gid; \ + req->statdata->st_rdev = statdata.st_rdev; \ + req->statdata->st_size = statdata.st_size; \ + req->statdata->st_atime = statdata.st_atime; \ + req->statdata->st_mtime = statdata.st_mtime; \ + req->statdata->st_ctime = statdata.st_ctime; \ + req->statdata->st_blksize = statdata.st_blksize; \ + req->statdata->st_blocks = statdata.st_blocks; \ + +static int +aio_proc (void *thr_arg) +{ + aio_thread *thr = thr_arg; + aio_req req; + int errno; + + /* this is very much kernel-specific :(:(:( */ + /* we rely on gcc's ability to create closures. */ + _syscall3(int,read,int,fd,char *,buf,size_t,count) + _syscall3(int,write,int,fd,char *,buf,size_t,count) + + _syscall3(int,open,char *,pathname,int,flags,mode_t,mode) + _syscall1(int,close,int,fd) + +#ifdef __NR_pread64 + _syscall5(int,pread64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) + _syscall5(int,pwrite64,int,fd,char *,buf,size_t,count,unsigned int,offset_lo,unsigned int,offset_hi) +#elif __NR_pread + _syscall4(int,pread,int,fd,char *,buf,size_t,count,offset_t,offset) + _syscall4(int,pwrite,int,fd,char *,buf,size_t,count,offset_t,offset) +#else +# error "neither pread nor pread64 defined" +#endif + + +#ifdef __NR_stat64 + _syscall2(int,stat64, const char *, filename, struct stat64 *, buf) + _syscall2(int,lstat64, const char *, filename, struct stat64 *, buf) + _syscall2(int,fstat64, int, fd, struct stat64 *, buf) +#elif __NR_stat + _syscall2(int,stat, const char *, filename, struct stat *, buf) + _syscall2(int,lstat, const char *, filename, struct stat *, buf) + _syscall2(int,fstat, int, fd, struct stat *, buf) +#else +# error "neither stat64 nor stat defined" +#endif + + _syscall1(int,unlink, char *, filename); + + sigprocmask (SIG_SETMASK, &fullsigset, 0); + prctl (PR_SET_PDEATHSIG, SIGKILL); + + /* then loop */ + while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) + { + req->thread = thr; + errno = 0; /* strictly unnecessary */ + + switch (req->type) + { +#ifdef __NR_pread64 + case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; + case REQ_WRITE: req->result = pwrite64(req->fd, req->dataptr, req->length, req->offset & 0xffffffff, req->offset >> 32); break; +#else + 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; +#endif +#ifdef __NR_stat64 + struct stat64 statdata; + case REQ_STAT: req->result = stat64 (req->dataptr, &statdata); COPY_STATDATA; break; + case REQ_LSTAT: req->result = lstat64 (req->dataptr, &statdata); COPY_STATDATA; break; + case REQ_FSTAT: req->result = fstat64 (req->fd, &statdata); COPY_STATDATA; break; +#else + struct stat statdata; + case REQ_STAT: req->result = stat (req->dataptr, &statdata); COPY_STATDATA; break; + case REQ_LSTAT: req->result = lstat (req->dataptr, &statdata); COPY_STATDATA; break; + case REQ_FSTAT: req->result = fstat (req->fd, &statdata); COPY_STATDATA; break; +#endif + 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_QUIT: + default: + write (respipe[1], (void *)&req, sizeof (req)); + return 0; + } + + req->errorno = errno; + write (respipe[1], (void *)&req, sizeof (req)); + } + + return 0; } MODULE = Linux::AIO PACKAGE = Linux::AIO BOOT: { + sigfillset (&fullsigset); + sigdelset (&fullsigset, SIGTERM); + sigdelset (&fullsigset, SIGQUIT); + sigdelset (&fullsigset, SIGABRT); + sigdelset (&fullsigset, SIGINT); + if (pipe (reqpipe) || pipe (respipe)) croak ("unable to initialize request or result pipe"); + + if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) + croak ("cannot set result pipe to nonblocking mode"); + + if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) + croak ("cannot set result pipe to nonblocking mode"); } void min_parallel(nthreads) int nthreads + PROTOTYPE: $ CODE: while (nthreads > started) start_thread (); @@ -70,10 +366,165 @@ void max_parallel(nthreads) int nthreads + PROTOTYPE: $ CODE: + int cur = started; + while (cur > nthreads) + { + end_thread (); + cur--; + } + while (started > nthreads) - end_thread (); + { + poll_wait (); + poll_cb (aTHX); + } + +void +aio_open(pathname,flags,mode,callback) + SV * pathname + int flags + int mode + SV * callback + PROTOTYPE: $$$$ + CODE: + aio_req req; + + Newz (0, req, 1, aio_cb); + + if (!req) + croak ("out of memory during aio_req allocation"); + + req->type = REQ_OPEN; + req->data = newSVsv (pathname); + req->dataptr = SvPV_nolen (req->data); + req->fd = flags; + req->mode = mode; + req->callback = SvREFCNT_inc (callback); + + send_req (req); + +void +aio_close(fh,callback) + InputStream fh + SV * callback + PROTOTYPE: $$ + CODE: + aio_req req; + + Newz (0, req, 1, aio_cb); + + if (!req) + croak ("out of memory during aio_req allocation"); + + req->type = REQ_CLOSE; + req->fd = PerlIO_fileno (fh); + req->callback = SvREFCNT_inc (callback); + + send_req (req); void -read(fh,offset,length,data,dataoffset,callback) +aio_read(fh,offset,length,data,dataoffset,callback) + InputStream fh + UV offset + IV length + SV * data + IV dataoffset + SV * callback + PROTOTYPE: $$$$$$ + CODE: + read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); + +void +aio_write(fh,offset,length,data,dataoffset,callback) + OutputStream fh + UV offset + IV length + SV * data + IV dataoffset + SV * callback + PROTOTYPE: $$$$$$ + CODE: + read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); + +void +aio_stat(fh_or_path,callback) + SV * fh_or_path + SV * callback + PROTOTYPE: $$ + ALIAS: + aio_lstat = 1 + CODE: + aio_req req; + + Newz (0, req, 1, aio_cb); + + if (!req) + croak ("out of memory during aio_req allocation"); + + New (0, req->statdata, 1, Stat_t); + + if (!req->statdata) + croak ("out of memory during aio_req->statdata allocation"); + + if (SvPOK (fh_or_path)) + { + req->type = ix ? REQ_LSTAT : REQ_STAT; + req->data = newSVsv (fh_or_path); + req->dataptr = SvPV_nolen (req->data); + } + else + { + req->type = REQ_FSTAT; + req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); + } + + req->callback = SvREFCNT_inc (callback); + + send_req (req); + +void +aio_unlink(pathname,callback) + SV * pathname + SV * callback + PROTOTYPE: $$ + CODE: + aio_req req; + + Newz (0, req, 1, aio_cb); + + if (!req) + croak ("out of memory during aio_req allocation"); + + req->type = REQ_UNLINK; + req->data = newSVsv (pathname); + req->dataptr = SvPV_nolen (req->data); + req->callback = SvREFCNT_inc (callback); + + send_req (req); + +int +poll_fileno() + PROTOTYPE: + CODE: + RETVAL = respipe[0]; + OUTPUT: + RETVAL + +int +poll_cb(...) + PROTOTYPE: CODE: + RETVAL = poll_cb (aTHX); + OUTPUT: + RETVAL + +int +nreqs() + PROTOTYPE: + CODE: + RETVAL = nreqs; + OUTPUT: + RETVAL +