Minor code improvements and split into multiple c files

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 34 insertions, 0 deletions

diff --git a/libcoopgamma_set_nonblocking.c b/libcoopgamma_set_nonblocking.c
new file mode 100644
index 0000000..91bae5a
--- /dev/null
+++ b/libcoopgamma_set_nonblocking.c
@@ -0,0 +1,34 @@
+/* See LICENSE file for copyright and license details. */
+#include "common.h"
+
+
+/**
+ * By default communication is blocking, this function
+ * can be used to switch between blocking and nonblocking
+ * 
+ * After setting the communication to nonblocking,
+ * `libcoopgamma_flush`, `libcoopgamma_synchronise` and
+ * and request-sending functions can fail with EAGAIN and
+ * EWOULDBLOCK. It is safe to continue with `libcoopgamma_flush`
+ * (for `libcoopgamma_flush` it selfand equest-sending functions)
+ * or `libcoopgamma_synchronise` just like EINTR failure.
+ * 
+ * @param   ctx          The state of the library, must be connected
+ * @param   nonblocking  Nonblocking mode?
+ * @return               Zero on success, -1 on error
+ */
+int
+libcoopgamma_set_nonblocking(libcoopgamma_context_t *restrict ctx, int nonblocking)
+{
+	int flags = fcntl(ctx->fd, F_GETFL);
+	if (flags == -1)
+		return -1;
+	if (nonblocking)
+		flags |= O_NONBLOCK;
+	else
+		flags &= ~O_NONBLOCK;
+	if (fcntl(ctx->fd, F_SETFL, flags) == -1)
+		return -1;
+	ctx->blocking = !nonblocking;
+	return 0;
+}