Merged in dstaesse/ouroboros/be-shm (pull request #37)

lib: shared memory map

2 files changed, 72 insertions, 0 deletions

diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt
index 167cf0e2..a196140b 100644
--- a/include/ouroboros/CMakeLists.txt
+++ b/include/ouroboros/CMakeLists.txt
@@ -14,6 +14,7 @@ set(HEADER_FILES
         list.h
         logs.h
         rina_name.h
+        shm_du_map.h
         sockets.h
         utils.h
 )
diff --git a/include/ouroboros/shm_du_map.h b/include/ouroboros/shm_du_map.h
new file mode 100644
index 00000000..05c49c2d
--- /dev/null
+++ b/include/ouroboros/shm_du_map.h
@@ -0,0 +1,71 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * Shared memory map for data units
+ *
+ *    Dimitri Staessens <[email protected]>
+ *    Sander Vrijders   <[email protected]>
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef OUROBOROS_SHM_DU_MAP_H
+#define OUROBOROS_SHM_DU_MAP_H
+
+#ifndef _POSIX_C_SOURCE
+#define _POSIX_C_SOURCE 199506L
+#endif
+
+#define OUROBOROS_PREFIX "shm_du_map"
+
+#ifndef SHM_DU_BUFF_BLOCK_SIZE
+#define SHM_DU_BUFF_BLOCK_SIZE sysconf(_SC_PAGESIZE)
+#endif
+
+#ifndef SHM_DU_MAP_FILENAME
+#define SHM_DU_MAP_FILENAME "ouroboros_du_map"
+#endif
+
+#ifndef SHM_BLOCKS_IN_MAP
+#define SHM_BLOCKS_IN_MAP (1 << 12)
+#endif
+
+#include "common.h"
+#include "logs.h"
+
+struct shm_du_buff;
+struct shm_du_map;
+
+struct shm_du_map  * shm_du_map_create();
+struct shm_du_map  * shm_du_map_open();
+void                 shm_du_map_close(struct shm_du_map * dum);
+
+struct shm_du_buff * shm_create_du_buff(struct shm_du_map * dum,
+                                        size_t              size,
+                                        size_t              headspace,
+                                        uint8_t           * data,
+                                        size_t              len);
+int                  shm_release_du_buff(struct shm_du_map  * dum);
+
+uint8_t * shm_du_buff_head_alloc(struct shm_du_buff * sdb,
+                                 size_t size);
+uint8_t * shm_du_buff_tail_alloc(struct shm_du_buff * sdb,
+                                 size_t size);
+int       shm_du_buff_head_release(struct shm_du_buff * sdb,
+                                   size_t size);
+int       shm_du_buff_tail_release(struct shm_du_buff * sdb,
+                                   size_t size);
+
+#endif /* OUROBOROS_SHM_DU_MAP_H */