1 files changed, 103 insertions, 0 deletions
diff --git a/src/bus.h b/src/bus.h
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+/**
+ * MIT/X Consortium License
+ * 
+ * Copyright © 2015  Mattias Andrée <maandree@member.fsf.org>
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ */
+#ifndef BUS_H
+#define BUS_H
+
+
+#include <sys/types.h>
+
+
+
+/**
+ * Open the bus for reading only
+ */
+#define BUS_RDONLY  1
+
+/**
+ * Open the bus for writing only
+ */
+#define BUS_WRONLY  0
+
+/**
+ * Open the bus for both reading and writing only
+ */
+#define BUS_RDWR    0
+
+/**
+ * Fail to create bus if its file already exists
+ */
+#define BUS_EXCL    2
+
+
+
+/**
+ * The number of bytes in storeable in the shared memory,
+ * note that this includes the NUL-termination.
+ * This means that message can be at most one byte smaller.
+ */
+#define BUS_MEMORY_SIZE  2048
+
+
+
+/**
+ * Bus information
+ */
+typedef struct bus
+{
+	/**
+	 * The key for the semaphore array
+	 */
+	key_t key_sem;
+
+	/**
+	 * The key for the 
+	 */
+	key_t key_shm;
+
+	/**
+	 * The ID of the semaphore array
+	 */
+	int sem_id;
+
+	/**
+	 * The address of the shared memory
+	 */
+	char *message;
+} bus_t;
+
+
+
+const char *bus_create(const char *file, int flags);
+int bus_unlink(const char *file);
+
+int bus_open(bus_t *bus, const char *file, int flags);
+int bus_close(bus_t *bus);
+
+int bus_write(const bus_t *bus, const char *message);
+int bus_read(const bus_t *bus, int (*callback)(const char *message, void *user_data), void *user_data);
+
+
+
+#endif
+