better ipc: using POSIX (semaphores && msg queues)

1 files changed, 46 insertions, 0 deletions

diff --git a/tests/mqtest.c b/tests/mqtest.c
new file mode 100644
index 0000000..56c2d2b
--- /dev/null
+++ b/tests/mqtest.c
@@ -0,0 +1,46 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <mqueue.h>
+
+#include <assert.h>
+
+
+static mqd_t mq_test;
+static const size_t bufsiz = 256;
+
+int main(int argc, char **argv)
+{
+  struct mq_attr m_attr;
+  char buf[bufsiz], recv[bufsiz];
+
+  memset(buf, '\0', bufsiz);
+  memset(buf, '\0', bufsiz);
+  if (argc > 1)
+    strncpy(buf, argv[1], bufsiz-1);
+
+  mq_unlink("/testmq");
+  assert( (mq_test = mq_open( "/testmq", O_CREAT | O_EXCL | O_RDWR  | O_NONBLOCK, S_IRUSR | S_IWUSR, NULL )) != (mqd_t)-1 );
+  assert( mq_getattr(mq_test, &m_attr) == 0 );
+  printf("flags.....: %ld\n"
+         "maxmsg....: %ld\n"
+         "msgsize...: %ld\n"
+         "curmsg....: %ld\n",
+         m_attr.mq_flags, m_attr.mq_maxmsg, m_attr.mq_msgsize, m_attr.mq_curmsgs);
+
+  m_attr.mq_msgsize = bufsiz-1;
+  assert ( mq_setattr(mq_test, &m_attr, NULL) == 0 );
+  assert ( mq_send(mq_test, buf, bufsiz-1, 0) == 0 );
+  assert ( mq_getattr(mq_test, &m_attr) == 0 );
+  printf("new msgsize...: %ld\n"
+         "new curmsg....: %ld\n",
+         m_attr.mq_msgsize, m_attr.mq_curmsgs);
+  assert ( mq_receive(mq_test, recv, bufsiz-1, 0) > 0 );
+
+  printf("RECV: %s\n", recv);
+
+  return 0;
+}
+