From d68c3647e69cce6aaf4fd3d94e3eb33e3125b31c Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Wed, 20 Jul 2016 12:24:12 +0000
Subject:  Add ipc_timed_send

---
 src/libunixonacid/ipc_timed_send.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 src/libunixonacid/ipc_timed_send.c

(limited to 'src/libunixonacid/ipc_timed_send.c')

diff --git a/src/libunixonacid/ipc_timed_send.c b/src/libunixonacid/ipc_timed_send.c
new file mode 100644
index 0000000..9ba1e32
--- /dev/null
+++ b/src/libunixonacid/ipc_timed_send.c
@@ -0,0 +1,31 @@
+/* ISC license. */
+
+#include <sys/socket.h>
+#include <errno.h>
+#include <skalibs/error.h>
+#include <skalibs/tai.h>
+#include <skalibs/iopause.h>
+#include <skalibs/unix-timed.h>
+
+ /* Yay MacOS */
+#ifndef MSG_NOSIGNAL
+#define MSG_NOSIGNAL 0
+#endif
+
+int ipc_timed_send (int fd, char const *s, unsigned int len, tain_t const *deadline, tain_t *stamp)
+{
+  iopause_fd x = { .fd = fd, .events = IOPAUSE_WRITE, .revents = 0 } ;
+  for (;;)
+  {
+    register int r = iopause_stamp(&x, 1, deadline, stamp) ;
+    if (r < 0) return 0 ;
+    else if (!r) return (errno = ETIMEDOUT, 0) ;
+    else if (x.revents & IOPAUSE_WRITE)
+    {
+      if (send(fd, s, len, MSG_NOSIGNAL) == (int)len) break ;
+      if (!error_isagain(errno)) return 0 ;
+    }
+    else if (x.revents & IOPAUSE_EXCEPT) return (send(fd, s, len, MSG_NOSIGNAL) == (int)len) ;
+  }
+  return 1 ;
+}
-- 
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