diff options
Diffstat (limited to 'm4/pthread-rwlock.m4')
| -rw-r--r-- | m4/pthread-rwlock.m4 | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/m4/pthread-rwlock.m4 b/m4/pthread-rwlock.m4 new file mode 100644 index 0000000000..ee5953c74b --- /dev/null +++ b/m4/pthread-rwlock.m4 @@ -0,0 +1,91 @@ +# pthread-rwlock.m4 serial 1 +dnl Copyright (C) 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. + +AC_DEFUN([gl_PTHREAD_RWLOCK], +[ + AC_REQUIRE([gl_PTHREAD_H]) + AC_REQUIRE([AC_CANONICAL_HOST]) + + if { case "$host_os" in mingw*) true;; *) false;; esac; } \ + && test $gl_threads_api = windows; then + dnl Choose function names that don't conflict with the mingw-w64 winpthreads + dnl library. + REPLACE_PTHREAD_RWLOCK_INIT=1 + REPLACE_PTHREAD_RWLOCKATTR_INIT=1 + REPLACE_PTHREAD_RWLOCKATTR_DESTROY=1 + REPLACE_PTHREAD_RWLOCK_RDLOCK=1 + REPLACE_PTHREAD_RWLOCK_WRLOCK=1 + REPLACE_PTHREAD_RWLOCK_TRYRDLOCK=1 + REPLACE_PTHREAD_RWLOCK_TRYWRLOCK=1 + REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK=1 + REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK=1 + REPLACE_PTHREAD_RWLOCK_UNLOCK=1 + REPLACE_PTHREAD_RWLOCK_DESTROY=1 + else + if test $HAVE_PTHREAD_H = 0; then + HAVE_PTHREAD_RWLOCK_INIT=0 + HAVE_PTHREAD_RWLOCKATTR_INIT=0 + HAVE_PTHREAD_RWLOCKATTR_DESTROY=0 + HAVE_PTHREAD_RWLOCK_RDLOCK=0 + HAVE_PTHREAD_RWLOCK_WRLOCK=0 + HAVE_PTHREAD_RWLOCK_TRYRDLOCK=0 + HAVE_PTHREAD_RWLOCK_TRYWRLOCK=0 + HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK=0 + HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK=0 + HAVE_PTHREAD_RWLOCK_UNLOCK=0 + HAVE_PTHREAD_RWLOCK_DESTROY=0 + else + dnl On Android 4.3, the pthread_rwlock_* functions are declared in + dnl <pthread.h> but don't exist in libc. + AC_CACHE_CHECK([for pthread_rwlock_init], + [gl_cv_func_pthread_rwlock_init], + [saved_LIBS="$LIBS" + LIBS="$LIBS $LIBMULTITHREAD" + AC_LINK_IFELSE( + [AC_LANG_SOURCE( + [[extern + #ifdef __cplusplus + "C" + #endif + int pthread_rwlock_init (void); + int main () + { + return pthread_rwlock_init (); + } + ]])], + [gl_cv_func_pthread_rwlock_init=yes], + [gl_cv_func_pthread_rwlock_init=no]) + LIBS="$saved_LIBS" + ]) + if test $gl_cv_func_pthread_rwlock_init = no; then + REPLACE_PTHREAD_RWLOCK_INIT=1 + REPLACE_PTHREAD_RWLOCKATTR_INIT=1 + REPLACE_PTHREAD_RWLOCKATTR_DESTROY=1 + REPLACE_PTHREAD_RWLOCK_RDLOCK=1 + REPLACE_PTHREAD_RWLOCK_WRLOCK=1 + REPLACE_PTHREAD_RWLOCK_TRYRDLOCK=1 + REPLACE_PTHREAD_RWLOCK_TRYWRLOCK=1 + REPLACE_PTHREAD_RWLOCK_TIMEDRDLOCK=1 + REPLACE_PTHREAD_RWLOCK_TIMEDWRLOCK=1 + REPLACE_PTHREAD_RWLOCK_UNLOCK=1 + REPLACE_PTHREAD_RWLOCK_DESTROY=1 + AC_DEFINE([PTHREAD_RWLOCK_UNIMPLEMENTED], [1], + [Define if all pthread_rwlock* functions don't exist.]) + else + dnl On Mac OS X 10.5, FreeBSD 5.2.1, OpenBSD 3.8, AIX 5.1, HP-UX 11, + dnl IRIX 6.5, Solaris 9, Cygwin, the pthread_rwlock_timed*lock functions + dnl don't exist, although the other pthread_rwlock* functions exist. + AC_CHECK_DECL([pthread_rwlock_timedrdlock], , + [HAVE_PTHREAD_RWLOCK_TIMEDRDLOCK=0 + HAVE_PTHREAD_RWLOCK_TIMEDWRLOCK=0 + AC_DEFINE([PTHREAD_RWLOCK_LACKS_TIMEOUT], [1], + [Define if the functions pthread_rwlock_timedrdlock and pthread_rwlock_timedwrlock don't exist.]) + ], + [[#include <pthread.h>]]) + fi + fi + fi +]) |