caod: imported basics for websocket management

Signed-off-by: Olivier Gayot <duskcoder@gmail.com>

1 files changed, 58 insertions, 0 deletions

diff --git a/misc.h b/misc.h
new file mode 100644
index 0000000..7a95681
--- /dev/null
+++ b/misc.h
@@ -0,0 +1,58 @@
+/*
+ * Copyright (C) 2014-2016
+ *     Olivier Gayot <ogayot@baylibre.com>
+ *     Bartosz Golaszewski <bgolaszewski@baylibre.com>
+ *     Olivier Gayot <olivier.gayot@sigexec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef MISC_H
+#define MISC_H
+
+#include <sys/time.h>
+
+#define ssizeof(_foo)  ((signed long)(sizeof((_foo))))
+#define countof(_array)  (ssizeof((_array)) / ssizeof((_array)[0]))
+
+#define unsafe_free(_ptr) free((_ptr))
+#define safe_free(_ptr) \
+    do { \
+        free((_ptr)); \
+        (_ptr) = NULL; \
+    } while (0)
+
+#ifdef CONFIG_DEBUG
+#define IF_DEBUG(...) __VA_ARGS__
+#else
+#define IF_DEBUG(...)
+#endif
+
+#define TV_FMT          "(%d.%d)"
+#define TV_PRINT(TV)    (int)(TV).tv_sec, (int)(TV).tv_usec
+
+/*
+ * Returns 1 if a file descriptor is ready for writing, 0 otherwise or -1
+ * on error.
+ */
+int caod_fd_wrready(int sock, struct timeval *tv);
+
+/*
+ * Returns 1 if a file descriptor is ready for reading, 0 otherwise or -1
+ * on error.
+ */
+int caod_fd_rdready(int sock, struct timeval *tv);
+
+#endif /* MISC_H */