database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-08-06 18:42:54 +03:00
Code Activity

Create an internal semaphore API that is not tied to SysV semaphores.

Browse Source 
As proof of concept, provide an alternate implementation based on POSIX
semaphores.  Also push the SysV shared-memory implementation into a
separate file so that it can be replaced conveniently.
This commit is contained in:
Tom Lane
2002-05-05 00:03:29 +00:00
parent 91fc10fdac
commit 72a3902a66
37 changed files with 1659 additions and 1370 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
configure.in
View File

@@ -1,5 +1,5 @@
dnl Process this file with autoconf to produce a configure script.
dnl $Header: /cvsroot/pgsql/configure.in,v 1.183 2002/04/26 19:47:35 tgl Exp $
dnl $Header: /cvsroot/pgsql/configure.in,v 1.184 2002/05/05 00:03:28 tgl Exp $
dnl Developers, please strive to achieve this order:
dnl
@@ -1168,6 +1168,26 @@ AC_CHECK_TYPES([sig_atomic_t], [], [], [#include <signal.h>])
PGAC_FUNC_POSIX_SIGNALS
# Select semaphore implementation type.
if test x"$USE_NAMED_POSIX_SEMAPHORES" = x"1" ; then
AC_DEFINE(USE_NAMED_POSIX_SEMAPHORES, 1, [Define to select named POSIX semaphores])
SEMA_IMPLEMENTATION="src/backend/port/posix_sema.c"
else
if test x"$USE_UNNAMED_POSIX_SEMAPHORES" = x"1" ; then
AC_DEFINE(USE_UNNAMED_POSIX_SEMAPHORES, 1, [Define to select unnamed POSIX semaphores])
SEMA_IMPLEMENTATION="src/backend/port/posix_sema.c"
else
AC_DEFINE(USE_SYSV_SEMAPHORES, 1, [Define to select SysV-style semaphores])
SEMA_IMPLEMENTATION="src/backend/port/sysv_sema.c"
fi
fi
# Select shared-memory implementation type.
AC_DEFINE(USE_SYSV_SHARED_MEMORY, 1, [Define to select SysV-style shared memory])
SHMEM_IMPLEMENTATION="src/backend/port/sysv_shmem.c"
if test "$enable_nls" = yes ; then
PGAC_CHECK_GETTEXT
fi
@@ -1222,6 +1242,8 @@ AC_CONFIG_FILES([GNUmakefile src/Makefile.global])
AC_CONFIG_LINKS([
src/backend/port/dynloader.c:src/backend/port/dynloader/${template}.c
src/backend/port/pg_sema.c:${SEMA_IMPLEMENTATION}
src/backend/port/pg_shmem.c:${SHMEM_IMPLEMENTATION}
src/include/dynloader.h:src/backend/port/dynloader/${template}.h
src/include/pg_config_os.h:src/include/port/${template}.h
src/Makefile.port:src/makefiles/Makefile.${template}