mirror of
https://git.zap.org.au/git/trader.git
synced 2024-11-03 17:27:29 -05:00
48 lines
1.5 KiB
Plaintext
48 lines
1.5 KiB
Plaintext
|
# lock.m4 serial 14
|
||
|
|
dnl Copyright (C) 2005-2019 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 <pthread.h>])
|
||
|
|
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 <pthread.h>]],
|
||
|
|
[[
|
||
|
|
#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 <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
|
||
|
|
fi
|
||
|
|
gl_PREREQ_LOCK
|
||
|
|
])
|
||
|
|
|
||
|
|
# Prerequisites of lib/glthread/lock.c.
|
||
|
|
AC_DEFUN([gl_PREREQ_LOCK], [:])
|