gnulib: m4/lock.m4 annotate

annotate m4/lock.m4 @ 40196:e63f5d3edab5

relocatable-prog: Update documentation. * doc/relocatable-maint.texi (Supporting Relocation): Update to match the recent changes.

author	Bruno Haible <bruno@clisp.org>
date	Sun, 24 Feb 2019 01:49:15 +0100
parents	b06060465f09
children

rev	line source
18647 9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	1 # lock.m4 serial 14
40057 b06060465f09 maint: Run 'make update-copyright' Paul Eggert <eggert@cs.ucla.edu> parents: 19484 diff changeset	2 dnl Copyright (C) 2005-2019 Free Software Foundation, Inc.
5994 8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	3 dnl This file is free software; the Free Software Foundation
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	4 dnl gives unlimited permission to copy and/or distribute it,
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	5 dnl with or without modifications, as long as this notice is preserved.
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	6
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	7 dnl From Bruno Haible.
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	8
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	9 AC_DEFUN([gl_LOCK],
7397 205d15e72fe9 Make it possible to invoke AC_GNU_SOURCE after gl_LOCK_EARLY. Bruno Haible <bruno@clisp.org> parents: 7357 diff changeset	10 [
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	11 AC_REQUIRE([gl_THREADLIB])
984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	12 if test "$gl_threads_api" = posix; then
16935 498a2211d839 Write "Mac OS X" instead of "MacOS X". Bruno Haible <bruno@clisp.org> parents: 16201 diff changeset	13 # OSF/1 4.0 and Mac OS X 10.1 lack the pthread_rwlock_t type and the
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	14 # pthread_rwlock_* functions.
18647 9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	15 has_rwlock=false
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	16 AC_CHECK_TYPE([pthread_rwlock_t],
18647 9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	17 [has_rwlock=true
9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	18 AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1],
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	19 [Define if the POSIX multithreading library has read/write locks.])],
984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	20 [],
984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	21 [#include <pthread.h>])
18647 9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	22 if $has_rwlock; then
9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	23 gl_PTHREAD_RWLOCK_RDLOCK_PREFER_WRITER
9c7c6767d0f6 lock: Provide guarantee to avoid writer starvation for rwlocks. Bruno Haible <bruno@clisp.org> parents: 18626 diff changeset	24 fi
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	25 # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
13577 d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	26 AC_COMPILE_IFELSE([
d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	27 AC_LANG_PROGRAM(
d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	28 [[#include <pthread.h>]],
d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	29 [[
d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	30 #if __FreeBSD__ == 4
5994 8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	31 error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
17388 c2f3bfaf5fce lock: work around pthread recursive mutexes bug in Mac OS X 10.6 Daiki Ueno <ueno@gnu.org> parents: 17249 diff changeset	32 #elif (defined __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ \
c2f3bfaf5fce lock: work around pthread recursive mutexes bug in Mac OS X 10.6 Daiki Ueno <ueno@gnu.org> parents: 17249 diff changeset	33 && __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070)
c2f3bfaf5fce lock: work around pthread recursive mutexes bug in Mac OS X 10.6 Daiki Ueno <ueno@gnu.org> parents: 17249 diff changeset	34 error "No, in Mac OS X < 10.7 recursive mutexes actually don't work."
5994 8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	35 #else
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	36 int x = (int)PTHREAD_MUTEX_RECURSIVE;
7357 28f050736570 Avoid warning at configure time with "gcc -Wall". Bruno Haible <bruno@clisp.org> parents: 7188 diff changeset	37 return !x;
13577 d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	38 #endif
d53740f6f336 Modernize AC_TRY_COMPILE invocations. Bruno Haible <bruno@clisp.org> parents: 12559 diff changeset	39 ]])],
11007 f6cba5a556ce many .m4 files: improve m4 quoting Jim Meyering <meyering@redhat.com>* parents: 10320 diff changeset	40 [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
10320 984531f1792d New module 'threadlib'. Bruno Haible <bruno@clisp.org> parents: 10217 diff changeset	41 [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
5994 8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	42 fi
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	43 gl_PREREQ_LOCK
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	44 ])
8694796f8a72 New gnulib module 'lock'. Bruno Haible <bruno@clisp.org> parents: diff changeset	45
17182 10268a7a6854 cond, lock, thread: better 'inline' Paul Eggert <eggert@cs.ucla.edu> parents: 16935 diff changeset	46 # Prerequisites of lib/glthread/lock.c.
10268a7a6854 cond, lock, thread: better 'inline' Paul Eggert <eggert@cs.ucla.edu> parents: 16935 diff changeset	47 AC_DEFUN([gl_PREREQ_LOCK], [:])

Mercurial > gnulib

annotate m4/lock.m4 @ 40196:e63f5d3edab5