From 69d903367cdea188bf865f4edd72a186cda9e689 Mon Sep 17 00:00:00 2001
From: Heikki Linnakangas
Date: Sun, 3 Dec 2023 16:09:42 +0200
Subject: Refactor CreateSharedMemoryAndSemaphores

For clarity, have separate functions for *creating* the shared memory
and semaphores at postmaster or single-user backend startup, and
for *attaching* to existing shared memory structures in EXEC_BACKEND
case. CreateSharedMemoryAndSemaphores() is now called only at
postmaster startup, and a new AttachSharedMemoryStructs() function is
called at backend startup in EXEC_BACKEND mode.

Reviewed-by: Tristan Partin, Andres Freund
Discussion: https://www.postgresql.org/message-id/7a59b073-5b5b-151e-7ed3-8b01ff7ce9ef@iki.fi
---
 src/include/storage/ipc.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'src/include')

diff --git a/src/include/storage/ipc.h b/src/include/storage/ipc.h
index 888c08b3067..e282dcad962 100644
--- a/src/include/storage/ipc.h
+++ b/src/include/storage/ipc.h
@@ -79,6 +79,9 @@ extern PGDLLIMPORT shmem_startup_hook_type shmem_startup_hook;
 
 extern Size CalculateShmemSize(int *num_semaphores);
 extern void CreateSharedMemoryAndSemaphores(void);
+#ifdef EXEC_BACKEND
+extern void AttachSharedMemoryStructs(void);
+#endif
 extern void InitializeShmemGUCs(void);
 
 #endif							/* IPC_H */
-- 
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