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srs/trunk/3rdparty/st-srs/io.c
winlin 339d3b31cc ST: Support thread-local for multiple threads. 
1. All statick and global variables is thread-local.
2. Call st_init() to init st for each thread.
3. Notice that ST is isolate for threads.
2022-06-28 20:49:53 +08:00

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/* SPDX-License-Identifier: MPL-1.1 OR GPL-2.0-or-later */
/*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Netscape Portable Runtime library.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1994-2000 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s): Silicon Graphics, Inc.
*
* Portions created by SGI are Copyright (C) 2000-2001 Silicon
* Graphics, Inc. All Rights Reserved.
*
* Alternatively, the contents of this file may be used under the
* terms of the GNU General Public License Version 2 or later (the
* "GPL"), in which case the provisions of the GPL are applicable
* instead of those above. If you wish to allow 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 MPL,
* 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 MPL or the
* GPL.
*/
/*
* This file is derived directly from Netscape Communications Corporation,
* and consists of extensive modifications made during the year(s) 1999-2000.
*/
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <fcntl.h>
#include <signal.h>
#include <errno.h>
#include "common.h"
// Global stat.
#if defined(DEBUG) && defined(DEBUG_STATS)
__thread unsigned long long _st_stat_recvfrom = 0;
__thread unsigned long long _st_stat_recvfrom_eagain = 0;
__thread unsigned long long _st_stat_sendto = 0;
__thread unsigned long long _st_stat_sendto_eagain = 0;
__thread unsigned long long _st_stat_read = 0;
__thread unsigned long long _st_stat_read_eagain = 0;
__thread unsigned long long _st_stat_readv = 0;
__thread unsigned long long _st_stat_readv_eagain = 0;
__thread unsigned long long _st_stat_writev = 0;
__thread unsigned long long _st_stat_writev_eagain = 0;
__thread unsigned long long _st_stat_recvmsg = 0;
__thread unsigned long long _st_stat_recvmsg_eagain = 0;
__thread unsigned long long _st_stat_sendmsg = 0;
__thread unsigned long long _st_stat_sendmsg_eagain = 0;
#endif
#if EAGAIN != EWOULDBLOCK
#define _IO_NOT_READY_ERROR ((errno == EAGAIN) || (errno == EWOULDBLOCK))
#else
#define _IO_NOT_READY_ERROR (errno == EAGAIN)
#endif
#define _LOCAL_MAXIOV 16
/* File descriptor object free list */
static __thread _st_netfd_t *_st_netfd_freelist = NULL;
/* Maximum number of file descriptors that the process can open */
static int _st_osfd_limit = -1;
static void _st_netfd_free_aux_data(_st_netfd_t *fd);
int _st_io_init(void)
{
struct sigaction sigact;
struct rlimit rlim;
int fdlim;
/* Ignore SIGPIPE */
sigact.sa_handler = SIG_IGN;
sigemptyset(&sigact.sa_mask);
sigact.sa_flags = 0;
if (sigaction(SIGPIPE, &sigact, NULL) < 0)
return -1;
/* Set maximum number of open file descriptors */
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0)
return -1;
fdlim = (*_st_eventsys->fd_getlimit)();
if (fdlim > 0 && rlim.rlim_max > (rlim_t) fdlim) {
rlim.rlim_max = fdlim;
}
/**
* by SRS, for osx.
* when rlimit max is negative, for example, osx, use cur directly.
* @see https://github.com/ossrs/srs/issues/336
*/
if ((int)rlim.rlim_max < 0) {
_st_osfd_limit = (int)(fdlim > 0? fdlim : rlim.rlim_cur);
return 0;
}
rlim.rlim_cur = rlim.rlim_max;
if (setrlimit(RLIMIT_NOFILE, &rlim) < 0)
return -1;
_st_osfd_limit = (int) rlim.rlim_max;
return 0;
}
int st_getfdlimit(void)
{
return _st_osfd_limit;
}
void st_netfd_free(_st_netfd_t *fd)
{
if (!fd->inuse)
return;
fd->inuse = 0;
if (fd->aux_data)
_st_netfd_free_aux_data(fd);
if (fd->private_data && fd->destructor)
(*(fd->destructor))(fd->private_data);
fd->private_data = NULL;
fd->destructor = NULL;
fd->next = _st_netfd_freelist;
_st_netfd_freelist = fd;
}
static _st_netfd_t *_st_netfd_new(int osfd, int nonblock, int is_socket)
{
_st_netfd_t *fd;
int flags = 1;
if ((*_st_eventsys->fd_new)(osfd) < 0)
return NULL;
if (_st_netfd_freelist) {
fd = _st_netfd_freelist;
_st_netfd_freelist = _st_netfd_freelist->next;
} else {
fd = calloc(1, sizeof(_st_netfd_t));
if (!fd)
return NULL;
}
fd->osfd = osfd;
fd->inuse = 1;
fd->next = NULL;
if (nonblock) {
/* Use just one system call */
if (is_socket && ioctl(osfd, FIONBIO, &flags) != -1)
return fd;
/* Do it the Posix way */
if ((flags = fcntl(osfd, F_GETFL, 0)) < 0 ||
fcntl(osfd, F_SETFL, flags | O_NONBLOCK) < 0) {
st_netfd_free(fd);
return NULL;
}
}
return fd;
}
_st_netfd_t *st_netfd_open(int osfd)
{
return _st_netfd_new(osfd, 1, 0);
}
_st_netfd_t *st_netfd_open_socket(int osfd)
{
return _st_netfd_new(osfd, 1, 1);
}
int st_netfd_close(_st_netfd_t *fd)
{
if ((*_st_eventsys->fd_close)(fd->osfd) < 0)
return -1;
st_netfd_free(fd);
return close(fd->osfd);
}
int st_netfd_fileno(_st_netfd_t *fd)
{
return (fd->osfd);
}
void st_netfd_setspecific(_st_netfd_t *fd, void *value, _st_destructor_t destructor)
{
if (value != fd->private_data) {
/* Free up previously set non-NULL data value */
if (fd->private_data && fd->destructor)
(*(fd->destructor))(fd->private_data);
}
fd->private_data = value;
fd->destructor = destructor;
}
void *st_netfd_getspecific(_st_netfd_t *fd)
{
return (fd->private_data);
}
/*
* Wait for I/O on a single descriptor.
*/
int st_netfd_poll(_st_netfd_t *fd, int how, st_utime_t timeout)
{
struct pollfd pd;
int n;
pd.fd = fd->osfd;
pd.events = (short) how;
pd.revents = 0;
if ((n = st_poll(&pd, 1, timeout)) < 0)
return -1;
if (n == 0) {
/* Timed out */
errno = ETIME;
return -1;
}
if (pd.revents & POLLNVAL) {
errno = EBADF;
return -1;
}
return 0;
}
/* No-op */
int st_netfd_serialize_accept(_st_netfd_t *fd)
{
fd->aux_data = NULL;
return 0;
}
/* No-op */
static void _st_netfd_free_aux_data(_st_netfd_t *fd)
{
fd->aux_data = NULL;
}
_st_netfd_t *st_accept(_st_netfd_t *fd, struct sockaddr *addr, int *addrlen, st_utime_t timeout)
{
int osfd, err;
_st_netfd_t *newfd;
while ((osfd = accept(fd->osfd, addr, (socklen_t *)addrlen)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return NULL;
/* Wait until the socket becomes readable */
if (st_netfd_poll(fd, POLLIN, timeout) < 0)
return NULL;
}
/* On some platforms the new socket created by accept() inherits */
/* the nonblocking attribute of the listening socket */
#if defined (MD_ACCEPT_NB_INHERITED)
newfd = _st_netfd_new(osfd, 0, 1);
#elif defined (MD_ACCEPT_NB_NOT_INHERITED)
newfd = _st_netfd_new(osfd, 1, 1);
#else
#error Unknown OS
#endif
if (!newfd) {
err = errno;
close(osfd);
errno = err;
}
return newfd;
}
int st_connect(_st_netfd_t *fd, const struct sockaddr *addr, int addrlen, st_utime_t timeout)
{
int n, err = 0;
while (connect(fd->osfd, addr, addrlen) < 0) {
if (errno != EINTR) {
/*
* On some platforms, if connect() is interrupted (errno == EINTR)
* after the kernel binds the socket, a subsequent connect()
* attempt will fail with errno == EADDRINUSE. Ignore EADDRINUSE
* iff connect() was previously interrupted. See Rich Stevens'
* "UNIX Network Programming," Vol. 1, 2nd edition, p. 413
* ("Interrupted connect").
*/
if (errno != EINPROGRESS && (errno != EADDRINUSE || err == 0))
return -1;
/* Wait until the socket becomes writable */
if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
return -1;
/* Try to find out whether the connection setup succeeded or failed */
n = sizeof(int);
if (getsockopt(fd->osfd, SOL_SOCKET, SO_ERROR, (char *)&err, (socklen_t *)&n) < 0)
return -1;
if (err) {
errno = err;
return -1;
}
break;
}
err = 1;
}
return 0;
}
ssize_t st_read(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
{
ssize_t n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_read;
#endif
while ((n = read(fd->osfd, buf, nbyte)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_read_eagain;
#endif
/* Wait until the socket becomes readable */
if (st_netfd_poll(fd, POLLIN, timeout) < 0)
return -1;
}
return n;
}
int st_read_resid(_st_netfd_t *fd, void *buf, size_t *resid, st_utime_t timeout)
{
struct iovec iov, *riov;
int riov_size, rv;
iov.iov_base = buf;
iov.iov_len = *resid;
riov = &iov;
riov_size = 1;
rv = st_readv_resid(fd, &riov, &riov_size, timeout);
*resid = iov.iov_len;
return rv;
}
ssize_t st_readv(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utime_t timeout)
{
ssize_t n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_readv;
#endif
while ((n = readv(fd->osfd, iov, iov_size)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_readv_eagain;
#endif
/* Wait until the socket becomes readable */
if (st_netfd_poll(fd, POLLIN, timeout) < 0)
return -1;
}
return n;
}
int st_readv_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime_t timeout)
{
ssize_t n;
while (*iov_size > 0) {
if (*iov_size == 1)
n = read(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
else
n = readv(fd->osfd, *iov, *iov_size);
if (n < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
} else if (n == 0)
break;
else {
while ((size_t) n >= (*iov)->iov_len) {
n -= (*iov)->iov_len;
(*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
(*iov)->iov_len = 0;
(*iov)++;
(*iov_size)--;
if (n == 0)
break;
}
if (*iov_size == 0)
break;
(*iov)->iov_base = (char *) (*iov)->iov_base + n;
(*iov)->iov_len -= n;
}
/* Wait until the socket becomes readable */
if (st_netfd_poll(fd, POLLIN, timeout) < 0)
return -1;
}
return 0;
}
ssize_t st_read_fully(_st_netfd_t *fd, void *buf, size_t nbyte, st_utime_t timeout)
{
size_t resid = nbyte;
return st_read_resid(fd, buf, &resid, timeout) == 0 ?
(ssize_t) (nbyte - resid) : -1;
}
int st_write_resid(_st_netfd_t *fd, const void *buf, size_t *resid, st_utime_t timeout)
{
struct iovec iov, *riov;
int riov_size, rv;
iov.iov_base = (void *) buf; /* we promise not to modify buf */
iov.iov_len = *resid;
riov = &iov;
riov_size = 1;
rv = st_writev_resid(fd, &riov, &riov_size, timeout);
*resid = iov.iov_len;
return rv;
}
ssize_t st_write(_st_netfd_t *fd, const void *buf, size_t nbyte, st_utime_t timeout)
{
size_t resid = nbyte;
return st_write_resid(fd, buf, &resid, timeout) == 0 ?
(ssize_t) (nbyte - resid) : -1;
}
ssize_t st_writev(_st_netfd_t *fd, const struct iovec *iov, int iov_size, st_utime_t timeout)
{
ssize_t n, rv;
size_t nleft, nbyte;
int index, iov_cnt;
struct iovec *tmp_iov;
struct iovec local_iov[_LOCAL_MAXIOV];
/* Calculate the total number of bytes to be sent */
nbyte = 0;
for (index = 0; index < iov_size; index++)
nbyte += iov[index].iov_len;
rv = (ssize_t)nbyte;
nleft = nbyte;
tmp_iov = (struct iovec *) iov; /* we promise not to modify iov */
iov_cnt = iov_size;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_writev;
#endif
while (nleft > 0) {
if (iov_cnt == 1) {
if (st_write(fd, tmp_iov[0].iov_base, nleft, timeout) != (ssize_t) nleft)
rv = -1;
break;
}
if ((n = writev(fd->osfd, tmp_iov, iov_cnt)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR) {
rv = -1;
break;
}
} else {
if ((size_t) n == nleft)
break;
nleft -= n;
/* Find the next unwritten vector */
n = (ssize_t)(nbyte - nleft);
for (index = 0; (size_t) n >= iov[index].iov_len; index++)
n -= iov[index].iov_len;
if (tmp_iov == iov) {
/* Must copy iov's around */
if (iov_size - index <= _LOCAL_MAXIOV) {
tmp_iov = local_iov;
} else {
tmp_iov = calloc(1, (iov_size - index) * sizeof(struct iovec));
if (tmp_iov == NULL)
return -1;
}
}
/* Fill in the first partial read */
tmp_iov[0].iov_base = &(((char *)iov[index].iov_base)[n]);
tmp_iov[0].iov_len = iov[index].iov_len - n;
index++;
/* Copy the remaining vectors */
for (iov_cnt = 1; index < iov_size; iov_cnt++, index++) {
tmp_iov[iov_cnt].iov_base = iov[index].iov_base;
tmp_iov[iov_cnt].iov_len = iov[index].iov_len;
}
}
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_writev_eagain;
#endif
/* Wait until the socket becomes writable */
if (st_netfd_poll(fd, POLLOUT, timeout) < 0) {
rv = -1;
break;
}
}
if (tmp_iov != iov && tmp_iov != local_iov)
free(tmp_iov);
return rv;
}
int st_writev_resid(_st_netfd_t *fd, struct iovec **iov, int *iov_size, st_utime_t timeout)
{
ssize_t n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_writev;
#endif
while (*iov_size > 0) {
if (*iov_size == 1)
n = write(fd->osfd, (*iov)->iov_base, (*iov)->iov_len);
else
n = writev(fd->osfd, *iov, *iov_size);
if (n < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
} else {
while ((size_t) n >= (*iov)->iov_len) {
n -= (*iov)->iov_len;
(*iov)->iov_base = (char *) (*iov)->iov_base + (*iov)->iov_len;
(*iov)->iov_len = 0;
(*iov)++;
(*iov_size)--;
if (n == 0)
break;
}
if (*iov_size == 0)
break;
(*iov)->iov_base = (char *) (*iov)->iov_base + n;
(*iov)->iov_len -= n;
}
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_writev_eagain;
#endif
/* Wait until the socket becomes writable */
if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
return -1;
}
return 0;
}
/*
* Simple I/O functions for UDP.
*/
int st_recvfrom(_st_netfd_t *fd, void *buf, int len, struct sockaddr *from, int *fromlen, st_utime_t timeout)
{
int n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_recvfrom;
#endif
while ((n = recvfrom(fd->osfd, buf, len, 0, from, (socklen_t *)fromlen)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_recvfrom_eagain;
#endif
/* Wait until the socket becomes readable */
if (st_netfd_poll(fd, POLLIN, timeout) < 0)
return -1;
}
return n;
}
int st_sendto(_st_netfd_t *fd, const void *msg, int len, const struct sockaddr *to, int tolen, st_utime_t timeout)
{
int n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_sendto;
#endif
while ((n = sendto(fd->osfd, msg, len, 0, to, tolen)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_sendto_eagain;
#endif
/* Wait until the socket becomes writable */
if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
return -1;
}
return n;
}
int st_recvmsg(_st_netfd_t *fd, struct msghdr *msg, int flags, st_utime_t timeout)
{
int n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_recvmsg;
#endif
while ((n = recvmsg(fd->osfd, msg, flags)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_recvmsg_eagain;
#endif
/* Wait until the socket becomes readable */
if (st_netfd_poll(fd, POLLIN, timeout) < 0)
return -1;
}
return n;
}
int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags, st_utime_t timeout)
{
int n;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_sendmsg;
#endif
while ((n = sendmsg(fd->osfd, msg, flags)) < 0) {
if (errno == EINTR)
continue;
if (!_IO_NOT_READY_ERROR)
return -1;
#if defined(DEBUG) && defined(DEBUG_STATS)
++_st_stat_sendmsg_eagain;
#endif
/* Wait until the socket becomes writable */
if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
return -1;
}
return n;
}
/*
* To open FIFOs or other special files.
*/
_st_netfd_t *st_open(const char *path, int oflags, mode_t mode)
{
int osfd, err;
_st_netfd_t *newfd;
while ((osfd = open(path, oflags | O_NONBLOCK, mode)) < 0) {
if (errno != EINTR)
return NULL;
}
newfd = _st_netfd_new(osfd, 0, 0);
if (!newfd) {
err = errno;
close(osfd);
errno = err;
}
return newfd;
}
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