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authorLaurent Bercot <ska-skaware@skarnet.org>2016-07-20 12:24:12 +0000
committerLaurent Bercot <ska-skaware@skarnet.org>2016-07-20 12:24:12 +0000
commitd68c3647e69cce6aaf4fd3d94e3eb33e3125b31c (patch)
tree18badf732631438ed7a6325d9634180270da6332 /src/libunixonacid
parente1dd693e2ac3c0fb1d42ea0e664021b4672465e6 (diff)
downloadskalibs-d68c3647e69cce6aaf4fd3d94e3eb33e3125b31c.tar.xz
Add ipc_timed_send
Diffstat (limited to 'src/libunixonacid')
-rw-r--r--src/libunixonacid/ipc_timed_send.c31
1 files changed, 31 insertions, 0 deletions
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 ;
+}