1 files changed, 39 insertions, 0 deletions
diff --git a/src/include/storage/dsm.h b/src/include/storage/dsm.h
new file mode 100644
index 00000000000..2b5e7227a0e
--- /dev/null
+++ b/src/include/storage/dsm.h
@@ -0,0 +1,39 @@
+/*-------------------------------------------------------------------------
+ *
+ * dsm.h
+ *	  manage dynamic shared memory segments
+ *
+ * Portions Copyright (c) 1996-2013, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/storage/dsm.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef DSM_H
+#define DSM_H
+
+#include "storage/dsm_impl.h"
+
+typedef struct dsm_segment dsm_segment;
+
+/* Initialization function. */
+extern void dsm_postmaster_startup(void);
+
+/* Functions that create, update, or remove mappings. */
+extern dsm_segment *dsm_create(uint64 size);
+extern dsm_segment *dsm_attach(dsm_handle h);
+extern void *dsm_resize(dsm_segment *seg, uint64 size);
+extern void *dsm_remap(dsm_segment *seg);
+extern void dsm_detach(dsm_segment *seg);
+
+/* Resource management functions. */
+extern void dsm_keep_mapping(dsm_segment *seg);
+extern dsm_segment *dsm_find_mapping(dsm_handle h);
+
+/* Informational functions. */
+extern void *dsm_segment_address(dsm_segment *seg);
+extern uint64 dsm_segment_map_length(dsm_segment *seg);
+extern dsm_handle dsm_segment_handle(dsm_segment *seg);
+
+#endif   /* DSM_H */