1 |
root |
1.19 |
#ifndef _REENTRANT |
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# define _REENTRANT 1 |
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#endif |
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#include <errno.h> |
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1.15 |
#include "EXTERN.h" |
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1.1 |
#include "perl.h" |
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#include "XSUB.h" |
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1.16 |
#include "autoconf/config.h" |
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1.1 |
#include <sys/types.h> |
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#include <sys/stat.h> |
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1.10 |
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1.1 |
#include <unistd.h> |
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#include <fcntl.h> |
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#include <signal.h> |
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#include <sched.h> |
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#include <pthread.h> |
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typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ |
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1.4 |
#if __ia64 |
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# define STACKSIZE 65536 |
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1.1 |
#else |
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1.4 |
# define STACKSIZE 4096 |
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1.1 |
#endif |
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enum { |
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REQ_QUIT, |
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REQ_OPEN, REQ_CLOSE, |
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REQ_READ, REQ_WRITE, REQ_READAHEAD, |
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REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, |
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REQ_FSYNC, REQ_FDATASYNC, |
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}; |
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typedef struct aio_cb { |
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1.3 |
struct aio_cb *volatile next; |
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1.1 |
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int type; |
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int fd; |
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off_t offset; |
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size_t length; |
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ssize_t result; |
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mode_t mode; /* open */ |
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int errorno; |
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1.13 |
SV *data, *callback, *fh; |
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1.1 |
void *dataptr; |
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STRLEN dataoffset; |
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Stat_t *statdata; |
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} aio_cb; |
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typedef aio_cb *aio_req; |
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static int started; |
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1.11 |
static volatile int nreqs; |
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1.4 |
static int max_outstanding = 1<<30; |
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1.3 |
static int respipe [2]; |
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1.1 |
|
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1.3 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
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static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
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static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
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static volatile aio_req reqs, reqe; /* queue start, queue end */ |
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static volatile aio_req ress, rese; /* queue start, queue end */ |
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1.1 |
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static void |
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poll_wait () |
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{ |
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1.11 |
if (nreqs && !ress) |
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{ |
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fd_set rfd; |
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FD_ZERO(&rfd); |
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FD_SET(respipe [0], &rfd); |
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1.3 |
|
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1.11 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
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} |
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1.1 |
} |
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static int |
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1.5 |
poll_cb () |
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1.1 |
{ |
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dSP; |
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int count = 0; |
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1.11 |
aio_req req, prv; |
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pthread_mutex_lock (&reslock); |
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1.3 |
{ |
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1.11 |
/* read any signals sent by the worker threads */ |
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1.3 |
char buf [32]; |
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while (read (respipe [0], buf, 32) > 0) |
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; |
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} |
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1.1 |
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1.11 |
req = ress; |
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ress = rese = 0; |
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1.3 |
|
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1.11 |
pthread_mutex_unlock (&reslock); |
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1.3 |
|
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1.11 |
while (req) |
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{ |
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1.1 |
nreqs--; |
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if (req->type == REQ_QUIT) |
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started--; |
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else |
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{ |
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int errorno = errno; |
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errno = req->errorno; |
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if (req->type == REQ_READ) |
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SvCUR_set (req->data, req->dataoffset |
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+ req->result > 0 ? req->result : 0); |
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if (req->data) |
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SvREFCNT_dec (req->data); |
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root |
1.13 |
if (req->fh) |
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SvREFCNT_dec (req->fh); |
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127 |
root |
1.1 |
if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) |
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{ |
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PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
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PL_laststatval = req->result; |
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PL_statcache = *(req->statdata); |
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Safefree (req->statdata); |
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} |
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1.13 |
ENTER; |
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1.1 |
PUSHMARK (SP); |
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XPUSHs (sv_2mortal (newSViv (req->result))); |
139 |
root |
1.2 |
|
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if (req->type == REQ_OPEN) |
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{ |
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/* convert fd to fh */ |
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SV *fh; |
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PUTBACK; |
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call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
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SPAGAIN; |
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149 |
root |
1.13 |
fh = SvREFCNT_inc (POPs); |
150 |
root |
1.2 |
|
151 |
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PUSHMARK (SP); |
152 |
root |
1.13 |
XPUSHs (sv_2mortal (fh)); |
153 |
root |
1.2 |
} |
154 |
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155 |
root |
1.8 |
if (SvOK (req->callback)) |
156 |
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{ |
157 |
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PUTBACK; |
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call_sv (req->callback, G_VOID | G_EVAL); |
159 |
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SPAGAIN; |
160 |
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} |
161 |
root |
1.13 |
|
162 |
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LEAVE; |
163 |
root |
1.1 |
|
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if (req->callback) |
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SvREFCNT_dec (req->callback); |
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errno = errorno; |
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count++; |
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} |
170 |
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root |
1.11 |
prv = req; |
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req = req->next; |
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Safefree (prv); |
174 |
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175 |
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/* TODO: croak on errors? */ |
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root |
1.1 |
} |
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178 |
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return count; |
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} |
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181 |
root |
1.4 |
static void *aio_proc(void *arg); |
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static void |
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start_thread (void) |
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{ |
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sigset_t fullsigset, oldsigset; |
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pthread_t tid; |
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pthread_attr_t attr; |
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190 |
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pthread_attr_init (&attr); |
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pthread_attr_setstacksize (&attr, STACKSIZE); |
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pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
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sigfillset (&fullsigset); |
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sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
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if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
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started++; |
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sigprocmask (SIG_SETMASK, &oldsigset, 0); |
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} |
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203 |
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static void |
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send_req (aio_req req) |
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{ |
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nreqs++; |
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pthread_mutex_lock (&reqlock); |
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req->next = 0; |
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if (reqe) |
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{ |
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reqe->next = req; |
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reqe = req; |
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} |
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else |
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reqe = reqs = req; |
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pthread_cond_signal (&reqwait); |
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pthread_mutex_unlock (&reqlock); |
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while (nreqs > max_outstanding) |
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{ |
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poll_wait (); |
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poll_cb (); |
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} |
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} |
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static void |
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end_thread (void) |
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{ |
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aio_req req; |
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New (0, req, 1, aio_cb); |
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req->type = REQ_QUIT; |
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send_req (req); |
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} |
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root |
1.17 |
/* work around various missing functions */ |
241 |
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242 |
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#if !HAVE_PREADWRITE |
243 |
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# define pread aio_pread |
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# define pwrite aio_pwrite |
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246 |
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/* |
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* make our pread/pwrite safe against themselves, but not against |
248 |
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* normal read/write by using a mutex. slows down execution a lot, |
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* but that's your problem, not mine. |
250 |
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*/ |
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static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; |
252 |
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253 |
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static ssize_t |
254 |
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pread (int fd, void *buf, size_t count, off_t offset) |
255 |
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{ |
256 |
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ssize_t res; |
257 |
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off_t ooffset; |
258 |
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259 |
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pthread_mutex_lock (&iolock); |
260 |
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ooffset = lseek (fd, 0, SEEK_CUR); |
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lseek (fd, offset, SEEK_SET); |
262 |
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res = read (fd, buf, count); |
263 |
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lseek (fd, ooffset, SEEK_SET); |
264 |
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pthread_mutex_unlock (&iolock); |
265 |
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266 |
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return res; |
267 |
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} |
268 |
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269 |
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static ssize_t |
270 |
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pwrite (int fd, void *buf, size_t count, off_t offset) |
271 |
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{ |
272 |
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ssize_t res; |
273 |
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off_t ooffset; |
274 |
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275 |
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pthread_mutex_lock (&iolock); |
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ooffset = lseek (fd, 0, SEEK_CUR); |
277 |
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lseek (fd, offset, SEEK_SET); |
278 |
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res = write (fd, buf, count); |
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lseek (fd, offset, SEEK_SET); |
280 |
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pthread_mutex_unlock (&iolock); |
281 |
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282 |
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return res; |
283 |
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} |
284 |
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#endif |
285 |
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286 |
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#if !HAVE_FDATASYNC |
287 |
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# define fdatasync fsync |
288 |
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#endif |
289 |
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290 |
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#if !HAVE_READAHEAD |
291 |
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# define readahead aio_readahead |
292 |
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293 |
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static char readahead_buf[4096]; |
294 |
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295 |
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static ssize_t |
296 |
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readahead (int fd, off_t offset, size_t count) |
297 |
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{ |
298 |
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while (count > 0) |
299 |
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{ |
300 |
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size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
301 |
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302 |
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pread (fd, readahead_buf, len, offset); |
303 |
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offset += len; |
304 |
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count -= len; |
305 |
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} |
306 |
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307 |
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errno = 0; |
308 |
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} |
309 |
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#endif |
310 |
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311 |
root |
1.1 |
static void * |
312 |
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aio_proc (void *thr_arg) |
313 |
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{ |
314 |
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aio_req req; |
315 |
root |
1.3 |
int type; |
316 |
root |
1.1 |
|
317 |
root |
1.3 |
do |
318 |
root |
1.1 |
{ |
319 |
root |
1.3 |
pthread_mutex_lock (&reqlock); |
320 |
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321 |
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for (;;) |
322 |
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{ |
323 |
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req = reqs; |
324 |
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325 |
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if (reqs) |
326 |
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{ |
327 |
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reqs = reqs->next; |
328 |
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if (!reqs) reqe = 0; |
329 |
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} |
330 |
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331 |
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if (req) |
332 |
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break; |
333 |
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334 |
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pthread_cond_wait (&reqwait, &reqlock); |
335 |
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} |
336 |
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337 |
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pthread_mutex_unlock (&reqlock); |
338 |
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339 |
root |
1.1 |
errno = 0; /* strictly unnecessary */ |
340 |
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341 |
root |
1.3 |
type = req->type; |
342 |
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343 |
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switch (type) |
344 |
root |
1.1 |
{ |
345 |
root |
1.10 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
346 |
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case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
347 |
root |
1.16 |
|
348 |
root |
1.1 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
349 |
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350 |
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case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
351 |
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case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
352 |
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case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
353 |
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354 |
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case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
355 |
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case REQ_CLOSE: req->result = close (req->fd); break; |
356 |
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case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
357 |
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358 |
root |
1.17 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
359 |
root |
1.1 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
360 |
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361 |
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case REQ_QUIT: |
362 |
root |
1.3 |
break; |
363 |
root |
1.1 |
|
364 |
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default: |
365 |
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req->result = ENOSYS; |
366 |
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break; |
367 |
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} |
368 |
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369 |
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req->errorno = errno; |
370 |
root |
1.3 |
|
371 |
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pthread_mutex_lock (&reslock); |
372 |
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373 |
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req->next = 0; |
374 |
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375 |
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if (rese) |
376 |
|
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{ |
377 |
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rese->next = req; |
378 |
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rese = req; |
379 |
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} |
380 |
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else |
381 |
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{ |
382 |
|
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rese = ress = req; |
383 |
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|
384 |
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/* write a dummy byte to the pipe so fh becomes ready */ |
385 |
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write (respipe [1], &respipe, 1); |
386 |
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} |
387 |
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388 |
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pthread_mutex_unlock (&reslock); |
389 |
root |
1.1 |
} |
390 |
root |
1.3 |
while (type != REQ_QUIT); |
391 |
root |
1.1 |
|
392 |
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return 0; |
393 |
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} |
394 |
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|
395 |
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MODULE = IO::AIO PACKAGE = IO::AIO |
396 |
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|
397 |
root |
1.8 |
PROTOTYPES: ENABLE |
398 |
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|
399 |
root |
1.1 |
BOOT: |
400 |
|
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{ |
401 |
root |
1.3 |
if (pipe (respipe)) |
402 |
|
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croak ("unable to initialize result pipe"); |
403 |
root |
1.1 |
|
404 |
root |
1.3 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
405 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
406 |
|
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|
407 |
root |
1.3 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
408 |
root |
1.1 |
croak ("cannot set result pipe to nonblocking mode"); |
409 |
|
|
} |
410 |
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|
411 |
|
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void |
412 |
|
|
min_parallel(nthreads) |
413 |
|
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int nthreads |
414 |
|
|
PROTOTYPE: $ |
415 |
|
|
CODE: |
416 |
|
|
while (nthreads > started) |
417 |
|
|
start_thread (); |
418 |
|
|
|
419 |
|
|
void |
420 |
|
|
max_parallel(nthreads) |
421 |
|
|
int nthreads |
422 |
|
|
PROTOTYPE: $ |
423 |
|
|
CODE: |
424 |
|
|
{ |
425 |
|
|
int cur = started; |
426 |
|
|
while (cur > nthreads) |
427 |
|
|
{ |
428 |
|
|
end_thread (); |
429 |
|
|
cur--; |
430 |
|
|
} |
431 |
|
|
|
432 |
|
|
while (started > nthreads) |
433 |
|
|
{ |
434 |
|
|
poll_wait (); |
435 |
root |
1.5 |
poll_cb (); |
436 |
root |
1.1 |
} |
437 |
|
|
} |
438 |
|
|
|
439 |
root |
1.4 |
int |
440 |
|
|
max_outstanding(nreqs) |
441 |
|
|
int nreqs |
442 |
|
|
PROTOTYPE: $ |
443 |
|
|
CODE: |
444 |
|
|
RETVAL = max_outstanding; |
445 |
|
|
max_outstanding = nreqs; |
446 |
|
|
|
447 |
root |
1.1 |
void |
448 |
root |
1.8 |
aio_open(pathname,flags,mode,callback=&PL_sv_undef) |
449 |
root |
1.1 |
SV * pathname |
450 |
|
|
int flags |
451 |
|
|
int mode |
452 |
|
|
SV * callback |
453 |
root |
1.8 |
PROTOTYPE: $$$;$ |
454 |
root |
1.1 |
CODE: |
455 |
|
|
{ |
456 |
|
|
aio_req req; |
457 |
|
|
|
458 |
|
|
Newz (0, req, 1, aio_cb); |
459 |
|
|
|
460 |
|
|
if (!req) |
461 |
|
|
croak ("out of memory during aio_req allocation"); |
462 |
|
|
|
463 |
|
|
req->type = REQ_OPEN; |
464 |
|
|
req->data = newSVsv (pathname); |
465 |
|
|
req->dataptr = SvPV_nolen (req->data); |
466 |
|
|
req->fd = flags; |
467 |
|
|
req->mode = mode; |
468 |
|
|
req->callback = SvREFCNT_inc (callback); |
469 |
|
|
|
470 |
|
|
send_req (req); |
471 |
|
|
} |
472 |
|
|
|
473 |
|
|
void |
474 |
root |
1.8 |
aio_close(fh,callback=&PL_sv_undef) |
475 |
root |
1.13 |
SV * fh |
476 |
|
|
SV * callback |
477 |
root |
1.8 |
PROTOTYPE: $;$ |
478 |
root |
1.1 |
ALIAS: |
479 |
|
|
aio_close = REQ_CLOSE |
480 |
|
|
aio_fsync = REQ_FSYNC |
481 |
|
|
aio_fdatasync = REQ_FDATASYNC |
482 |
|
|
CODE: |
483 |
|
|
{ |
484 |
|
|
aio_req req; |
485 |
|
|
|
486 |
|
|
Newz (0, req, 1, aio_cb); |
487 |
|
|
|
488 |
|
|
if (!req) |
489 |
|
|
croak ("out of memory during aio_req allocation"); |
490 |
|
|
|
491 |
|
|
req->type = ix; |
492 |
root |
1.13 |
req->fh = newSVsv (fh); |
493 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
494 |
root |
1.1 |
req->callback = SvREFCNT_inc (callback); |
495 |
|
|
|
496 |
|
|
send_req (req); |
497 |
|
|
} |
498 |
|
|
|
499 |
|
|
void |
500 |
root |
1.8 |
aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
501 |
root |
1.13 |
SV * fh |
502 |
|
|
UV offset |
503 |
|
|
IV length |
504 |
|
|
SV * data |
505 |
|
|
IV dataoffset |
506 |
|
|
SV * callback |
507 |
|
|
ALIAS: |
508 |
|
|
aio_read = REQ_READ |
509 |
|
|
aio_write = REQ_WRITE |
510 |
root |
1.8 |
PROTOTYPE: $$$$$;$ |
511 |
root |
1.1 |
CODE: |
512 |
root |
1.13 |
{ |
513 |
|
|
aio_req req; |
514 |
|
|
STRLEN svlen; |
515 |
|
|
char *svptr = SvPV (data, svlen); |
516 |
|
|
|
517 |
|
|
SvUPGRADE (data, SVt_PV); |
518 |
|
|
SvPOK_on (data); |
519 |
root |
1.1 |
|
520 |
root |
1.13 |
if (dataoffset < 0) |
521 |
|
|
dataoffset += svlen; |
522 |
|
|
|
523 |
|
|
if (dataoffset < 0 || dataoffset > svlen) |
524 |
|
|
croak ("data offset outside of string"); |
525 |
|
|
|
526 |
|
|
if (ix == REQ_WRITE) |
527 |
|
|
{ |
528 |
|
|
/* write: check length and adjust. */ |
529 |
|
|
if (length < 0 || length + dataoffset > svlen) |
530 |
|
|
length = svlen - dataoffset; |
531 |
|
|
} |
532 |
|
|
else |
533 |
|
|
{ |
534 |
|
|
/* read: grow scalar as necessary */ |
535 |
|
|
svptr = SvGROW (data, length + dataoffset); |
536 |
|
|
} |
537 |
|
|
|
538 |
|
|
if (length < 0) |
539 |
|
|
croak ("length must not be negative"); |
540 |
|
|
|
541 |
|
|
Newz (0, req, 1, aio_cb); |
542 |
|
|
|
543 |
|
|
if (!req) |
544 |
|
|
croak ("out of memory during aio_req allocation"); |
545 |
|
|
|
546 |
|
|
req->type = ix; |
547 |
|
|
req->fh = newSVsv (fh); |
548 |
|
|
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
549 |
|
|
: IoOFP (sv_2io (fh))); |
550 |
|
|
req->offset = offset; |
551 |
|
|
req->length = length; |
552 |
|
|
req->data = SvREFCNT_inc (data); |
553 |
|
|
req->dataptr = (char *)svptr + dataoffset; |
554 |
|
|
req->callback = SvREFCNT_inc (callback); |
555 |
|
|
|
556 |
|
|
send_req (req); |
557 |
|
|
} |
558 |
root |
1.1 |
|
559 |
|
|
void |
560 |
root |
1.8 |
aio_readahead(fh,offset,length,callback=&PL_sv_undef) |
561 |
root |
1.13 |
SV * fh |
562 |
|
|
UV offset |
563 |
|
|
IV length |
564 |
|
|
SV * callback |
565 |
root |
1.8 |
PROTOTYPE: $$$;$ |
566 |
root |
1.1 |
CODE: |
567 |
|
|
{ |
568 |
|
|
aio_req req; |
569 |
|
|
|
570 |
|
|
if (length < 0) |
571 |
|
|
croak ("length must not be negative"); |
572 |
|
|
|
573 |
|
|
Newz (0, req, 1, aio_cb); |
574 |
|
|
|
575 |
|
|
if (!req) |
576 |
|
|
croak ("out of memory during aio_req allocation"); |
577 |
|
|
|
578 |
|
|
req->type = REQ_READAHEAD; |
579 |
root |
1.13 |
req->fh = newSVsv (fh); |
580 |
|
|
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
581 |
root |
1.1 |
req->offset = offset; |
582 |
|
|
req->length = length; |
583 |
|
|
req->callback = SvREFCNT_inc (callback); |
584 |
|
|
|
585 |
|
|
send_req (req); |
586 |
|
|
} |
587 |
|
|
|
588 |
|
|
void |
589 |
root |
1.8 |
aio_stat(fh_or_path,callback=&PL_sv_undef) |
590 |
root |
1.1 |
SV * fh_or_path |
591 |
|
|
SV * callback |
592 |
|
|
ALIAS: |
593 |
root |
1.8 |
aio_stat = REQ_STAT |
594 |
|
|
aio_lstat = REQ_LSTAT |
595 |
root |
1.1 |
CODE: |
596 |
|
|
{ |
597 |
|
|
aio_req req; |
598 |
|
|
|
599 |
|
|
Newz (0, req, 1, aio_cb); |
600 |
|
|
|
601 |
|
|
if (!req) |
602 |
|
|
croak ("out of memory during aio_req allocation"); |
603 |
|
|
|
604 |
|
|
New (0, req->statdata, 1, Stat_t); |
605 |
|
|
|
606 |
|
|
if (!req->statdata) |
607 |
|
|
croak ("out of memory during aio_req->statdata allocation"); |
608 |
|
|
|
609 |
|
|
if (SvPOK (fh_or_path)) |
610 |
|
|
{ |
611 |
root |
1.8 |
req->type = ix; |
612 |
root |
1.1 |
req->data = newSVsv (fh_or_path); |
613 |
|
|
req->dataptr = SvPV_nolen (req->data); |
614 |
|
|
} |
615 |
|
|
else |
616 |
|
|
{ |
617 |
|
|
req->type = REQ_FSTAT; |
618 |
root |
1.13 |
req->fh = newSVsv (fh_or_path); |
619 |
root |
1.1 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
620 |
|
|
} |
621 |
|
|
|
622 |
|
|
req->callback = SvREFCNT_inc (callback); |
623 |
|
|
|
624 |
|
|
send_req (req); |
625 |
|
|
} |
626 |
|
|
|
627 |
|
|
void |
628 |
root |
1.8 |
aio_unlink(pathname,callback=&PL_sv_undef) |
629 |
root |
1.1 |
SV * pathname |
630 |
|
|
SV * callback |
631 |
|
|
CODE: |
632 |
|
|
{ |
633 |
|
|
aio_req req; |
634 |
|
|
|
635 |
|
|
Newz (0, req, 1, aio_cb); |
636 |
|
|
|
637 |
|
|
if (!req) |
638 |
|
|
croak ("out of memory during aio_req allocation"); |
639 |
|
|
|
640 |
|
|
req->type = REQ_UNLINK; |
641 |
|
|
req->data = newSVsv (pathname); |
642 |
|
|
req->dataptr = SvPV_nolen (req->data); |
643 |
|
|
req->callback = SvREFCNT_inc (callback); |
644 |
|
|
|
645 |
|
|
send_req (req); |
646 |
|
|
} |
647 |
|
|
|
648 |
root |
1.6 |
void |
649 |
|
|
flush() |
650 |
|
|
PROTOTYPE: |
651 |
|
|
CODE: |
652 |
|
|
while (nreqs) |
653 |
|
|
{ |
654 |
|
|
poll_wait (); |
655 |
|
|
poll_cb (); |
656 |
|
|
} |
657 |
|
|
|
658 |
root |
1.7 |
void |
659 |
|
|
poll() |
660 |
|
|
PROTOTYPE: |
661 |
|
|
CODE: |
662 |
|
|
if (nreqs) |
663 |
|
|
{ |
664 |
|
|
poll_wait (); |
665 |
|
|
poll_cb (); |
666 |
|
|
} |
667 |
|
|
|
668 |
root |
1.1 |
int |
669 |
|
|
poll_fileno() |
670 |
|
|
PROTOTYPE: |
671 |
|
|
CODE: |
672 |
root |
1.3 |
RETVAL = respipe [0]; |
673 |
root |
1.1 |
OUTPUT: |
674 |
|
|
RETVAL |
675 |
|
|
|
676 |
|
|
int |
677 |
|
|
poll_cb(...) |
678 |
|
|
PROTOTYPE: |
679 |
|
|
CODE: |
680 |
root |
1.5 |
RETVAL = poll_cb (); |
681 |
root |
1.1 |
OUTPUT: |
682 |
|
|
RETVAL |
683 |
|
|
|
684 |
|
|
void |
685 |
|
|
poll_wait() |
686 |
|
|
PROTOTYPE: |
687 |
|
|
CODE: |
688 |
root |
1.3 |
if (nreqs) |
689 |
|
|
poll_wait (); |
690 |
root |
1.1 |
|
691 |
|
|
int |
692 |
|
|
nreqs() |
693 |
|
|
PROTOTYPE: |
694 |
|
|
CODE: |
695 |
|
|
RETVAL = nreqs; |
696 |
|
|
OUTPUT: |
697 |
|
|
RETVAL |
698 |
|
|
|