From e0023883c6d2e6745a19e4b48e186ed156c1fca8 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 17:19:27 +0200 Subject: Adding upstream version 2.11.2. Signed-off-by: Daniel Baumann --- gl/m4/lock.m4 | 47 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 gl/m4/lock.m4 (limited to 'gl/m4/lock.m4') diff --git a/gl/m4/lock.m4 b/gl/m4/lock.m4 new file mode 100644 index 0000000..c4cbf07 --- /dev/null +++ b/gl/m4/lock.m4 @@ -0,0 +1,47 @@ +# lock.m4 serial 14 +dnl Copyright (C) 2005-2022 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl From Bruno Haible. + +AC_DEFUN([gl_LOCK], +[ + AC_REQUIRE([gl_THREADLIB]) + if test "$gl_threads_api" = posix; then + # OSF/1 4.0 and Mac OS X 10.1 lack the pthread_rwlock_t type and the + # pthread_rwlock_* functions. + has_rwlock=false + AC_CHECK_TYPE([pthread_rwlock_t], + [has_rwlock=true + AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1], + [Define if the POSIX multithreading library has read/write locks.])], + [], + [#include ]) + if $has_rwlock; then + gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER + fi + # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro. + AC_COMPILE_IFELSE([ + AC_LANG_PROGRAM( + [[#include ]], + [[ +#if __FreeBSD__ == 4 +error "No, in FreeBSD 4.0 recursive mutexes actually don't work." +#elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \ + && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070) +error "No, in Mac OS X < 10.7 recursive mutexes actually don't work." +#else +int x = (int)PTHREAD_MUTEX_RECURSIVE; +return !x; +#endif + ]])], + [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1], + [Define if the defines PTHREAD_MUTEX_RECURSIVE.])]) + fi + gl_PREREQ_LOCK +]) + +# Prerequisites of lib/glthread/lock.c. +AC_DEFUN([gl_PREREQ_LOCK], [:]) -- cgit v1.2.3