ST: For #2188: Remove sendmmsg from ST.

Author: winlinvip

trunk/3rdparty/st-srs/Makefile

@@ -159,10 +159,6 @@ endif
 #
 # make EXTRA_CFLAGS=-UMD_HAVE_EPOLL <target>
 #
-# or to enable sendmmsg(2) support:
-#
-# make EXTRA_CFLAGS="-DMD_HAVE_SENDMMSG -D_GNU_SOURCE"
-#
 # or to enable stats for ST:
 #
 # make EXTRA_CFLAGS=-DDEBUG_STATS

trunk/3rdparty/st-srs/io.c

@@ -68,8 +68,6 @@ unsigned long long _st_stat_recvmsg = 0;
 unsigned long long _st_stat_recvmsg_eagain = 0;
 unsigned long long _st_stat_sendmsg = 0;
 unsigned long long _st_stat_sendmsg_eagain = 0;
-unsigned long long _st_stat_sendmmsg = 0;
-unsigned long long _st_stat_sendmmsg_eagain = 0;
 #endif
 
 #if EAGAIN != EWOULDBLOCK
@@ -726,69 +724,6 @@ int st_sendmsg(_st_netfd_t *fd, const struct msghdr *msg, int flags, st_utime_t
     return n;
 }
 
-int st_sendmmsg(st_netfd_t fd, struct st_mmsghdr *msgvec, unsigned int vlen, int flags, st_utime_t timeout)
-{
-#if defined(MD_HAVE_SENDMMSG) && defined(_GNU_SOURCE)
-    int n;
-    int left;
-    struct mmsghdr *p;
-
-    #if defined(DEBUG) && defined(DEBUG_STATS)
-    ++_st_stat_sendmmsg;
-    #endif
-
-    left = (int)vlen;
-    while (left > 0) {
-        p = (struct mmsghdr*)msgvec + (vlen - left);
-
-        if ((n = sendmmsg(fd->osfd, p, left, flags)) < 0) {
-            if (errno == EINTR)
-                continue;
-            if (!_IO_NOT_READY_ERROR)
-                break;
-
-            #if defined(DEBUG) && defined(DEBUG_STATS)
-            ++_st_stat_sendmmsg_eagain;
-            #endif
-
-            /* Wait until the socket becomes writable */
-            if (st_netfd_poll(fd, POLLOUT, timeout) < 0)
-                break;
-        }
-
-        left -= n;
-    }
-
-    // An error is returned only if no datagrams could be sent.
-    if (left == (int)vlen) {
-        return n;
-    }
-    return (int)vlen - left;
-#else
-    struct st_mmsghdr *p;
-    int i, n;
-
-    // @see http://man7.org/linux/man-pages/man2/sendmmsg.2.html
-    for (i = 0; i < (int)vlen; ++i) {
-        p = msgvec + i;
-        n = st_sendmsg(fd, &p->msg_hdr, flags, timeout);
-        if (n < 0) {
-            // An error is returned only if no datagrams could be sent.
-            if (i == 0) {
-                return n;
-            }
-            return i + 1;
-        }
-
-        p->msg_len = n;
-    }
-
-    // Returns the number of messages sent from msgvec; if this is less than vlen, the caller can retry with a
-    // further sendmmsg() call to send the remaining messages.
-    return vlen;
-#endif
-}
-
 
 /*
  * To open FIFOs or other special files.

trunk/3rdparty/st-srs/public.h

@@ -151,14 +151,6 @@ extern int st_sendto(st_netfd_t fd, const void *msg, int len, const struct socka
 extern int st_recvmsg(st_netfd_t fd, struct msghdr *msg, int flags, st_utime_t timeout);
 extern int st_sendmsg(st_netfd_t fd, const struct msghdr *msg, int flags, st_utime_t timeout);
 
-// @see http://man7.org/linux/man-pages/man2/sendmmsg.2.html
-#include <sys/socket.h>
-struct st_mmsghdr {
-   struct msghdr msg_hdr;  /* Message header */
-   unsigned int  msg_len;  /* Number of bytes transmitted */
-};
-extern int st_sendmmsg(st_netfd_t fd, struct st_mmsghdr *msgvec, unsigned int vlen, int flags, st_utime_t timeout);
-
 extern st_netfd_t st_open(const char *path, int oflags, mode_t mode);
 
 #ifdef DEBUG

trunk/research/msg_zerocopy/client.cpp

@@ -279,6 +279,8 @@ int main(int argc, char** argv)
                 memcpy(&p->msg_hdr, &msg, sizeof(msghdr));
                 p->msg_len = 0;
             }
+            
+            // The sendmmsg is removed by https://github.com/ossrs/srs/commit/34dae0fe0ddf2e95353ca8cbdc799f4abf96aead
             if (zerocopy) {
                 r0 = st_sendmmsg(stfd, hdrs, nn_copies + 1, MSG_ZEROCOPY, ST_UTIME_NO_TIMEOUT);
             } else {