GNU Pth saw its last release in 2006. I don't think it will be revived,
nor will it have real use any more, because new operating systems come
with <pthread.h> already implemented. (For example, this was the case
with Haiku and is the case with Fuchsia OS.)
The option --enable-threads=pth and <threads.h>/<pthread.h> are
incompatible, because Pth is based on cooperative multithreading, i.e.
every thread has to call yield() every now and then, to give the
other threads a chance to become active.
I'm starting to implement the functionality of module 'lock' in a
module 'pthread-mutex', and will then use this module in many places.
So, more and more code of gnulib will become incompatible with
--enable-threads=pth.
For this reason, the option --enable-threads=pth has no future. I'm
removing it right away.
2019-07-05 Bruno Haible <br...@clisp.org>
thread, lock, cond, tls: Remove support for Pth threads.
* m4/threadlib.m4 (gl_THREADLIB_EARLY_BODY): Don't document
--enable-threads=pth any more.
(gl_THREADLIB_BODY): Don't set USE_PTH_THREADS any more.
* m4/pthread_sigmask.m4 (gl_FUNC_PTHREAD_SIGMASK): Update comment.
* m4/threads.m4 (gl_THREADS_H): Remove test for conflict between Pth
threads and ISO C11 threads.
* lib/glthread/thread.h: Remove code for USE_PTH_THREADS.
* lib/glthread/lock.h: Likewise.
* lib/glthread/lock.c: Likewise.
* lib/glthread/cond.h: Likewise.
* lib/glthread/cond.c: Likewise.
* lib/glthread/tls.h: Likewise.
* lib/glthread/tls.c: Likewise.
* lib/glthread/yield.h: Likewise.
* lib/regex_internal.h: Likewise.
* tests/test-thread_create.c: Likewise.
* tests/test-lock.c: Likewise.
* tests/test-cond.c: Likewise.
* tests/test-tls.c: Likewise.
* tests/test-rwlock1.c: Don't include glthread/yield.h.
(main): Sleep without calling gl_thread_yield.
diff --git a/lib/glthread/cond.c b/lib/glthread/cond.c
index 72aeca4..f6a06cc 100644
--- a/lib/glthread/cond.c
+++ b/lib/glthread/cond.c
@@ -24,34 +24,6 @@
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* -------------------------- gl_cond_t datatype -------------------------- */
-
-int
-glthread_cond_timedwait_multithreaded (gl_cond_t *cond,
- gl_lock_t *lock,
- struct timespec *abstime)
-{
- int ret, status;
- pth_event_t ev;
-
- ev = pth_event (PTH_EVENT_TIME, pth_time (abstime->tv_sec, abstime->tv_nsec
/ 1000));
- ret = pth_cond_await (cond, lock, ev);
-
- status = pth_event_status (ev);
- pth_event_free (ev, PTH_FREE_THIS);
-
- if (status == PTH_STATUS_OCCURRED)
- return ETIMEDOUT;
-
- return ret;
-}
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
#endif
diff --git a/lib/glthread/cond.h b/lib/glthread/cond.h
index b03ffe3..4c6f4d9 100644
--- a/lib/glthread/cond.h
+++ b/lib/glthread/cond.h
@@ -56,7 +56,7 @@
#include "glthread/lock.h"
#if !defined c11_threads_in_use
-# if HAVE_THREADS_H && (USE_POSIX_THREADS_WEAK || USE_PTH_THREADS_WEAK)
+# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
# include <threads.h>
# pragma weak thrd_exit
# define c11_threads_in_use() (thrd_exit != NULL)
@@ -168,65 +168,6 @@ typedef pthread_cond_t gl_cond_t;
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* Use the GNU Pth threads library. */
-
-# include <pth.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-# if USE_PTH_THREADS_WEAK
-
-/* Use weak references to the GNU Pth threads library. */
-
-# pragma weak pth_cond_init
-# pragma weak pth_cond_await
-# pragma weak pth_cond_notify
-# pragma weak pth_event
-# pragma weak pth_timeout
-
-# pragma weak pth_cancel
-# define pth_in_use() (pth_cancel != NULL || c11_threads_in_use ())
-
-# else
-
-# define pth_in_use() 1
-
-# endif
-
-/* -------------------------- gl_cond_t datatype -------------------------- */
-
-typedef pth_cond_t gl_cond_t;
-# define gl_cond_define(STORAGECLASS, NAME) \
- STORAGECLASS gl_cond_t NAME;
-# define gl_cond_define_initialized(STORAGECLASS, NAME) \
- STORAGECLASS gl_cond_t NAME = gl_cond_initializer;
-# define gl_cond_initializer \
- PTH_COND_INIT
-# define glthread_cond_init(COND) \
- (pth_in_use () && !pth_cond_init (COND) ? errno : 0)
-# define glthread_cond_wait(COND, LOCK) \
- (pth_in_use () && !pth_cond_await (COND, LOCK, NULL) ? errno : 0)
-# define glthread_cond_timedwait(COND, LOCK, ABSTIME) \
- (pth_in_use () ? glthread_cond_timedwait_multithreaded (COND, LOCK,
ABSTIME) : 0)
-# define glthread_cond_signal(COND) \
- (pth_in_use () && !pth_cond_notify (COND, FALSE) ? errno : 0)
-# define glthread_cond_broadcast(COND) \
- (pth_in_use () && !pth_cond_notify (COND, TRUE) ? errno : 0)
-# define glthread_cond_destroy(COND) 0
-extern int glthread_cond_timedwait_multithreaded (gl_cond_t *cond, gl_lock_t
*lock, struct timespec *abstime);
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
@@ -273,7 +214,7 @@ typedef glwthread_cond_t gl_cond_t;
/* ========================================================================= */
-#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS)
+#if !(USE_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
diff --git a/lib/glthread/lock.c b/lib/glthread/lock.c
index e7fa3f8..89f1f50 100644
--- a/lib/glthread/lock.c
+++ b/lib/glthread/lock.c
@@ -499,186 +499,6 @@ glthread_once_singlethreaded (pthread_once_t
*once_control)
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* Use the GNU Pth threads library. */
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-# if !HAVE_PTH_RWLOCK_ACQUIRE_PREFER_WRITER
-
-int
-glthread_rwlock_init_multithreaded (gl_rwlock_t *lock)
-{
- if (!pth_mutex_init (&lock->lock))
- return errno;
- if (!pth_cond_init (&lock->waiting_readers))
- return errno;
- if (!pth_cond_init (&lock->waiting_writers))
- return errno;
- lock->waiting_writers_count = 0;
- lock->runcount = 0;
- lock->initialized = 1;
- return 0;
-}
-
-int
-glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock)
-{
- if (!lock->initialized)
- glthread_rwlock_init_multithreaded (lock);
- if (!pth_mutex_acquire (&lock->lock, 0, NULL))
- return errno;
- /* Test whether only readers are currently running, and whether the runcount
- field will not overflow, and whether no writer is waiting. The latter
- condition is because POSIX recommends that "write locks shall take
- precedence over read locks", to avoid "writer starvation". */
- while (!(lock->runcount + 1 > 0 && lock->waiting_writers_count == 0))
- {
- /* This thread has to wait for a while. Enqueue it among the
- waiting_readers. */
- if (!pth_cond_await (&lock->waiting_readers, &lock->lock, NULL))
- {
- int err = errno;
- pth_mutex_release (&lock->lock);
- return err;
- }
- }
- lock->runcount++;
- return (!pth_mutex_release (&lock->lock) ? errno : 0);
-}
-
-int
-glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock)
-{
- if (!lock->initialized)
- glthread_rwlock_init_multithreaded (lock);
- if (!pth_mutex_acquire (&lock->lock, 0, NULL))
- return errno;
- /* Test whether no readers or writers are currently running. */
- while (!(lock->runcount == 0))
- {
- /* This thread has to wait for a while. Enqueue it among the
- waiting_writers. */
- lock->waiting_writers_count++;
- if (!pth_cond_await (&lock->waiting_writers, &lock->lock, NULL))
- {
- int err = errno;
- lock->waiting_writers_count--;
- pth_mutex_release (&lock->lock);
- return err;
- }
- lock->waiting_writers_count--;
- }
- lock->runcount--; /* runcount becomes -1 */
- return (!pth_mutex_release (&lock->lock) ? errno : 0);
-}
-
-int
-glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock)
-{
- int err;
-
- if (!lock->initialized)
- return EINVAL;
- if (!pth_mutex_acquire (&lock->lock, 0, NULL))
- return errno;
- if (lock->runcount < 0)
- {
- /* Drop a writer lock. */
- if (!(lock->runcount == -1))
- {
- pth_mutex_release (&lock->lock);
- return EINVAL;
- }
- lock->runcount = 0;
- }
- else
- {
- /* Drop a reader lock. */
- if (!(lock->runcount > 0))
- {
- pth_mutex_release (&lock->lock);
- return EINVAL;
- }
- lock->runcount--;
- }
- if (lock->runcount == 0)
- {
- /* POSIX recommends that "write locks shall take precedence over read
- locks", to avoid "writer starvation". */
- if (lock->waiting_writers_count > 0)
- {
- /* Wake up one of the waiting writers. */
- if (!pth_cond_notify (&lock->waiting_writers, FALSE))
- {
- int err = errno;
- pth_mutex_release (&lock->lock);
- return err;
- }
- }
- else
- {
- /* Wake up all waiting readers. */
- if (!pth_cond_notify (&lock->waiting_readers, TRUE))
- {
- int err = errno;
- pth_mutex_release (&lock->lock);
- return err;
- }
- }
- }
- return (!pth_mutex_release (&lock->lock) ? errno : 0);
-}
-
-int
-glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock)
-{
- lock->initialized = 0;
- return 0;
-}
-
-# endif
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-static void
-glthread_once_call (void *arg)
-{
- void (**gl_once_temp_addr) (void) = (void (**) (void)) arg;
- void (*initfunction) (void) = *gl_once_temp_addr;
- initfunction ();
-}
-
-int
-glthread_once_multithreaded (pth_once_t *once_control, void (*initfunction)
(void))
-{
- void (*temp) (void) = initfunction;
- return (!pth_once (once_control, glthread_once_call, &temp) ? errno : 0);
-}
-
-int
-glthread_once_singlethreaded (pth_once_t *once_control)
-{
- /* We know that pth_once_t is an integer type. */
- if (*once_control == PTH_ONCE_INIT)
- {
- /* First time use of once_control. Invert the marker. */
- *once_control = ~ PTH_ONCE_INIT;
- return 1;
- }
- else
- return 0;
-}
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
/* ------------------------- gl_rwlock_t datatype ------------------------- */
diff --git a/lib/glthread/lock.h b/lib/glthread/lock.h
index 2db8b7e..bc3a4de 100644
--- a/lib/glthread/lock.h
+++ b/lib/glthread/lock.h
@@ -81,7 +81,7 @@
#include <stdlib.h>
#if !defined c11_threads_in_use
-# if HAVE_THREADS_H && (USE_POSIX_THREADS_WEAK || USE_PTH_THREADS_WEAK)
+# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
# include <threads.h>
# pragma weak thrd_exit
# define c11_threads_in_use() (thrd_exit != NULL)
@@ -405,156 +405,6 @@ extern int glthread_once_singlethreaded (pthread_once_t
*once_control);
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* Use the GNU Pth threads library. */
-
-# include <pth.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-# if USE_PTH_THREADS_WEAK
-
-/* Use weak references to the GNU Pth threads library. */
-
-# pragma weak pth_mutex_init
-# pragma weak pth_mutex_acquire
-# pragma weak pth_mutex_release
-# pragma weak pth_rwlock_init
-# pragma weak pth_rwlock_acquire
-# pragma weak pth_rwlock_release
-# pragma weak pth_once
-# pragma weak pth_cond_init
-# pragma weak pth_cond_await
-# pragma weak pth_cond_notify
-
-# pragma weak pth_cancel
-# define pth_in_use() (pth_cancel != NULL || c11_threads_in_use ())
-
-# else
-
-# define pth_in_use() 1
-
-# endif
-
-/* -------------------------- gl_lock_t datatype -------------------------- */
-
-typedef pth_mutex_t gl_lock_t;
-# define gl_lock_define(STORAGECLASS, NAME) \
- STORAGECLASS pth_mutex_t NAME;
-# define gl_lock_define_initialized(STORAGECLASS, NAME) \
- STORAGECLASS pth_mutex_t NAME = gl_lock_initializer;
-# define gl_lock_initializer \
- PTH_MUTEX_INIT
-# define glthread_lock_init(LOCK) \
- (pth_in_use () && !pth_mutex_init (LOCK) ? errno : 0)
-# define glthread_lock_lock(LOCK) \
- (pth_in_use () && !pth_mutex_acquire (LOCK, 0, NULL) ? errno : 0)
-# define glthread_lock_unlock(LOCK) \
- (pth_in_use () && !pth_mutex_release (LOCK) ? errno : 0)
-# define glthread_lock_destroy(LOCK) \
- ((void)(LOCK), 0)
-
-/* ------------------------- gl_rwlock_t datatype ------------------------- */
-
-/* Pth pth_rwlock_acquire always prefers readers. No autoconf test so far. */
-# if HAVE_PTH_RWLOCK_ACQUIRE_PREFER_WRITER
-
-typedef pth_rwlock_t gl_rwlock_t;
-# define gl_rwlock_define(STORAGECLASS, NAME) \
- STORAGECLASS pth_rwlock_t NAME;
-# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
- STORAGECLASS pth_rwlock_t NAME = gl_rwlock_initializer;
-# define gl_rwlock_initializer \
- PTH_RWLOCK_INIT
-# define glthread_rwlock_init(LOCK) \
- (pth_in_use () && !pth_rwlock_init (LOCK) ? errno : 0)
-# define glthread_rwlock_rdlock(LOCK) \
- (pth_in_use () && !pth_rwlock_acquire (LOCK, PTH_RWLOCK_RD, 0, NULL) ?
errno : 0)
-# define glthread_rwlock_wrlock(LOCK) \
- (pth_in_use () && !pth_rwlock_acquire (LOCK, PTH_RWLOCK_RW, 0, NULL) ?
errno : 0)
-# define glthread_rwlock_unlock(LOCK) \
- (pth_in_use () && !pth_rwlock_release (LOCK) ? errno : 0)
-# define glthread_rwlock_destroy(LOCK) \
- ((void)(LOCK), 0)
-
-# else
-
-typedef struct
- {
- int initialized;
- pth_mutex_t lock; /* protects the remaining fields */
- pth_cond_t waiting_readers; /* waiting readers */
- pth_cond_t waiting_writers; /* waiting writers */
- unsigned int waiting_writers_count; /* number of waiting writers */
- int runcount; /* number of readers running, or -1 when a writer runs
*/
- }
- gl_rwlock_t;
-# define gl_rwlock_define(STORAGECLASS, NAME) \
- STORAGECLASS gl_rwlock_t NAME;
-# define gl_rwlock_define_initialized(STORAGECLASS, NAME) \
- STORAGECLASS gl_rwlock_t NAME = gl_rwlock_initializer;
-# define gl_rwlock_initializer \
- { 0 }
-# define glthread_rwlock_init(LOCK) \
- (pth_in_use () ? glthread_rwlock_init_multithreaded (LOCK) : 0)
-# define glthread_rwlock_rdlock(LOCK) \
- (pth_in_use () ? glthread_rwlock_rdlock_multithreaded (LOCK) : 0)
-# define glthread_rwlock_wrlock(LOCK) \
- (pth_in_use () ? glthread_rwlock_wrlock_multithreaded (LOCK) : 0)
-# define glthread_rwlock_unlock(LOCK) \
- (pth_in_use () ? glthread_rwlock_unlock_multithreaded (LOCK) : 0)
-# define glthread_rwlock_destroy(LOCK) \
- (pth_in_use () ? glthread_rwlock_destroy_multithreaded (LOCK) : 0)
-extern int glthread_rwlock_init_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_rdlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_wrlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_unlock_multithreaded (gl_rwlock_t *lock);
-extern int glthread_rwlock_destroy_multithreaded (gl_rwlock_t *lock);
-
-# endif
-
-/* --------------------- gl_recursive_lock_t datatype --------------------- */
-
-/* In Pth, mutexes are recursive by default. */
-typedef pth_mutex_t gl_recursive_lock_t;
-# define gl_recursive_lock_define(STORAGECLASS, NAME) \
- STORAGECLASS pth_mutex_t NAME;
-# define gl_recursive_lock_define_initialized(STORAGECLASS, NAME) \
- STORAGECLASS pth_mutex_t NAME = gl_recursive_lock_initializer;
-# define gl_recursive_lock_initializer \
- PTH_MUTEX_INIT
-# define glthread_recursive_lock_init(LOCK) \
- (pth_in_use () && !pth_mutex_init (LOCK) ? errno : 0)
-# define glthread_recursive_lock_lock(LOCK) \
- (pth_in_use () && !pth_mutex_acquire (LOCK, 0, NULL) ? errno : 0)
-# define glthread_recursive_lock_unlock(LOCK) \
- (pth_in_use () && !pth_mutex_release (LOCK) ? errno : 0)
-# define glthread_recursive_lock_destroy(LOCK) \
- ((void)(LOCK), 0)
-
-/* -------------------------- gl_once_t datatype -------------------------- */
-
-typedef pth_once_t gl_once_t;
-# define gl_once_define(STORAGECLASS, NAME) \
- STORAGECLASS pth_once_t NAME = PTH_ONCE_INIT;
-# define glthread_once(ONCE_CONTROL, INITFUNCTION) \
- (pth_in_use ()
\
- ? glthread_once_multithreaded (ONCE_CONTROL, INITFUNCTION)
\
- : (glthread_once_singlethreaded (ONCE_CONTROL) ? (INITFUNCTION (), 0) :
0))
-extern int glthread_once_multithreaded (pth_once_t *once_control, void
(*initfunction) (void));
-extern int glthread_once_singlethreaded (pth_once_t *once_control);
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
@@ -677,7 +527,7 @@ typedef glwthread_once_t gl_once_t;
/* ========================================================================= */
-#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS)
+#if !(USE_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
diff --git a/lib/glthread/thread.h b/lib/glthread/thread.h
index eed2eb6..eef9a46 100644
--- a/lib/glthread/thread.h
+++ b/lib/glthread/thread.h
@@ -74,7 +74,7 @@
#include <stdlib.h>
#if !defined c11_threads_in_use
-# if HAVE_THREADS_H && (USE_POSIX_THREADS_WEAK || USE_PTH_THREADS_WEAK)
+# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
# include <threads.h>
# pragma weak thrd_exit
# define c11_threads_in_use() (thrd_exit != NULL)
@@ -222,60 +222,6 @@ extern const gl_thread_t gl_null_thread;
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* Use the GNU Pth threads library. */
-
-# include <pth.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-# if USE_PTH_THREADS_WEAK
-
-/* Use weak references to the GNU Pth threads library. */
-
-# pragma weak pth_init
-# pragma weak pth_spawn
-# pragma weak pth_sigmask
-# pragma weak pth_join
-# pragma weak pth_self
-# pragma weak pth_exit
-
-# pragma weak pth_cancel
-# define pth_in_use() (pth_cancel != NULL || c11_threads_in_use ())
-
-# else
-
-# define pth_in_use() 1
-
-# endif
-/* -------------------------- gl_thread_t datatype --------------------------
*/
-
-typedef pth_t gl_thread_t;
-# define glthread_create(THREADP, FUNC, ARG) \
- (pth_in_use () ? (pth_init (), ((*(THREADP) = pth_spawn (NULL, FUNC, ARG))
? 0 : errno)) : 0)
-# define glthread_sigmask(HOW, SET, OSET) \
- (pth_in_use () ? (pth_init (), (pth_sigmask (HOW, SET, OSET) ? 0 : errno))
: 0)
-# define glthread_join(THREAD, RETVALP) \
- (pth_in_use () ? (pth_init (), (pth_join (THREAD, RETVALP) ? 0 : errno)) :
0)
-# define gl_thread_self() \
- (pth_in_use () ? (pth_init (), (void *) pth_self ()) : NULL)
-# define gl_thread_self_pointer() \
- gl_thread_self ()
-# define gl_thread_exit(RETVAL) \
- (pth_in_use () ? (pth_init (), pth_exit (RETVAL)) : 0)
-# define glthread_atfork(PREPARE_FUNC, PARENT_FUNC, CHILD_FUNC) 0
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
@@ -312,7 +258,7 @@ typedef glwthread_thread_t gl_thread_t;
/* ========================================================================= */
-#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS)
+#if !(USE_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
diff --git a/lib/glthread/tls.c b/lib/glthread/tls.c
index cc6d4e1..d182266 100644
--- a/lib/glthread/tls.c
+++ b/lib/glthread/tls.c
@@ -28,12 +28,6 @@
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
#endif
diff --git a/lib/glthread/tls.h b/lib/glthread/tls.h
index a86dcd4..cfc9606 100644
--- a/lib/glthread/tls.h
+++ b/lib/glthread/tls.h
@@ -47,7 +47,7 @@
#include <stdlib.h>
#if !defined c11_threads_in_use
-# if HAVE_THREADS_H && (USE_POSIX_THREADS_WEAK || USE_PTH_THREADS_WEAK)
+# if HAVE_THREADS_H && USE_POSIX_THREADS_WEAK
# include <threads.h>
# pragma weak thrd_exit
# define c11_threads_in_use() (thrd_exit != NULL)
@@ -126,59 +126,6 @@ typedef union
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* Use the GNU Pth threads library. */
-
-# include <pth.h>
-
-# if USE_PTH_THREADS_WEAK
-
-/* Use weak references to the GNU Pth threads library. */
-
-# pragma weak pth_key_create
-# pragma weak pth_key_getdata
-# pragma weak pth_key_setdata
-# pragma weak pth_key_delete
-
-# pragma weak pth_cancel
-# define pth_in_use() (pth_cancel != NULL || c11_threads_in_use ())
-
-# else
-
-# define pth_in_use() 1
-
-# endif
-
-/* ------------------------- gl_tls_key_t datatype ------------------------- */
-
-typedef union
- {
- void *singlethread_value;
- pth_key_t key;
- }
- gl_tls_key_t;
-# define glthread_tls_key_init(KEY, DESTRUCTOR) \
- (pth_in_use () \
- ? (!pth_key_create (&(KEY)->key, DESTRUCTOR) ? errno : 0) \
- : ((KEY)->singlethread_value = NULL, 0))
-# define gl_tls_get(NAME) \
- (pth_in_use () \
- ? pth_key_getdata ((NAME).key) \
- : (NAME).singlethread_value)
-# define glthread_tls_set(KEY, POINTER) \
- (pth_in_use () \
- ? (!pth_key_setdata ((KEY)->key, (POINTER)) ? errno : 0) \
- : ((KEY)->singlethread_value = (POINTER), 0))
-# define glthread_tls_key_destroy(KEY) \
- (pth_in_use () \
- ? (!pth_key_delete ((KEY)->key) ? errno : 0) \
- : 0)
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
@@ -202,7 +149,7 @@ typedef glwthread_tls_key_t gl_tls_key_t;
/* ========================================================================= */
-#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS)
+#if !(USE_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
diff --git a/lib/glthread/yield.h b/lib/glthread/yield.h
index 3a2877b..27bca55 100644
--- a/lib/glthread/yield.h
+++ b/lib/glthread/yield.h
@@ -46,27 +46,6 @@ extern "C" {
/* ========================================================================= */
-#if USE_PTH_THREADS
-
-/* Use the GNU Pth threads library. */
-
-# include <pth.h>
-
-# ifdef __cplusplus
-extern "C" {
-# endif
-
-# define gl_thread_yield() \
- pth_yield (NULL)
-
-# ifdef __cplusplus
-}
-# endif
-
-#endif
-
-/* ========================================================================= */
-
#if USE_WINDOWS_THREADS
# define WIN32_LEAN_AND_MEAN /* avoid including junk */
@@ -87,7 +66,7 @@ extern "C" {
/* ========================================================================= */
-#if !(USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS)
+#if !(USE_POSIX_THREADS || USE_WINDOWS_THREADS)
/* Provide dummy implementation if threads are not supported. */
diff --git a/lib/regex_internal.h b/lib/regex_internal.h
index 16e18ca..ec4bf30 100644
--- a/lib/regex_internal.h
+++ b/lib/regex_internal.h
@@ -51,8 +51,6 @@
# define lock_define(name) gl_lock_define (, name)
# elif USE_POSIX_THREADS
# define lock_define(name) pthread_mutex_t name;
-# elif USE_PTH_THREADS
-# define lock_define(name) pth_mutex_t name;
# elif USE_WINDOWS_THREADS
# define lock_define(name) gl_lock_t name;
# else
diff --git a/m4/pthread_sigmask.m4 b/m4/pthread_sigmask.m4
index 648edf9..d788cf6 100644
--- a/m4/pthread_sigmask.m4
+++ b/m4/pthread_sigmask.m4
@@ -1,4 +1,4 @@
-# pthread_sigmask.m4 serial 17
+# pthread_sigmask.m4 serial 18
dnl Copyright (C) 2011-2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -75,10 +75,6 @@ AC_DEFUN([gl_FUNC_PTHREAD_SIGMASK],
else
dnl pthread_sigmask may exist but does not interoperate with the chosen
dnl multithreading facility.
- dnl If "$gl_threads_api" = pth, we could use the function pth_sigmask,
- dnl but it is equivalent to sigprocmask, so we choose to emulate
- dnl pthread_sigmask with sigprocmask also in this case. This yields
- dnl fewer link dependencies.
if test $ac_cv_func_pthread_sigmask = yes; then
REPLACE_PTHREAD_SIGMASK=1
else
diff --git a/m4/threadlib.m4 b/m4/threadlib.m4
index 74b95b6..045d9da 100644
--- a/m4/threadlib.m4
+++ b/m4/threadlib.m4
@@ -1,4 +1,4 @@
-# threadlib.m4 serial 19
+# threadlib.m4 serial 20
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,
@@ -16,8 +16,7 @@ dnl (it must be placed before the invocation of
gl_THREADLIB_EARLY!), then the
dnl default is 'no', otherwise it is system dependent. In both cases, the user
dnl can change the choice through the options --enable-threads=choice or
dnl --disable-threads.
-dnl Defines at most one of the macros USE_POSIX_THREADS, USE_PTH_THREADS,
-dnl USE_WINDOWS_THREADS.
+dnl Defines at most one of the macros USE_POSIX_THREADS, USE_WINDOWS_THREADS.
dnl Sets the variables LIBTHREAD and LTLIBTHREAD to the linker options for use
dnl in a Makefile (LIBTHREAD for use without libtool, LTLIBTHREAD for use with
dnl libtool).
@@ -27,6 +26,9 @@ dnl between LIBTHREAD and LIBMULTITHREAD is that on platforms
supporting weak
dnl symbols, typically LIBTHREAD is empty whereas LIBMULTITHREAD is not.
dnl Adds to CPPFLAGS the flag -D_REENTRANT or -D_THREAD_SAFE if needed for
dnl multithread-safe programs.
+dnl Since support for GNU pth was removed, $LTLIBTHREAD and $LIBTHREAD have the
+dnl same value, and similarly $LTLIBMULTITHREAD and $LIBMULTITHREAD have the
+dnl same value. Only system libraries are needed.
AC_DEFUN([gl_THREADLIB_EARLY],
[
@@ -52,7 +54,7 @@ AC_DEFUN([gl_THREADLIB_EARLY_BODY],
[m4_divert_text([DEFAULTS], [gl_use_threads_default=])])
m4_divert_text([DEFAULTS], [gl_use_winpthreads_default=])
AC_ARG_ENABLE([threads],
-AC_HELP_STRING([--enable-threads={posix|pth|windows}], [specify multithreading
API])m4_ifdef([gl_THREADLIB_DEFAULT_NO], [], [
+AC_HELP_STRING([--enable-threads={posix|windows}], [specify multithreading
API])m4_ifdef([gl_THREADLIB_DEFAULT_NO], [], [
AC_HELP_STRING([--disable-threads], [build without multithread safety])]),
[gl_use_threads=$enableval],
[if test -n "$gl_use_threads_default"; then
@@ -250,36 +252,6 @@ int main ()
fi
fi
fi
- if test "$gl_use_threads" = pth; then
- gl_save_CPPFLAGS="$CPPFLAGS"
- AC_LIB_LINKFLAGS([pth])
- gl_have_pth=
- gl_save_LIBS="$LIBS"
- LIBS="$LIBS $LIBPTH"
- AC_LINK_IFELSE(
- [AC_LANG_PROGRAM([[#include <pth.h>]], [[pth_self();]])],
- [gl_have_pth=yes])
- LIBS="$gl_save_LIBS"
- if test -n "$gl_have_pth"; then
- gl_threads_api=pth
- LIBTHREAD="$LIBPTH"
- LTLIBTHREAD="$LTLIBPTH"
- LIBMULTITHREAD="$LIBTHREAD"
- LTLIBMULTITHREAD="$LTLIBTHREAD"
- AC_DEFINE([USE_PTH_THREADS], [1],
- [Define if the GNU Pth multithreading library can be used.])
- if test -n "$LIBMULTITHREAD" || test -n "$LTLIBMULTITHREAD"; then
- if case "$gl_cv_have_weak" in *yes) true;; *) false;; esac; then
- AC_DEFINE([USE_PTH_THREADS_WEAK], [1],
- [Define if references to the GNU Pth multithreading library
should be made weak.])
- LIBTHREAD=
- LTLIBTHREAD=
- fi
- fi
- else
- CPPFLAGS="$gl_save_CPPFLAGS"
- fi
- fi
if test -z "$gl_have_pthread"; then
case "$gl_use_threads" in
yes | windows | win32) # The 'win32' is for backward compatibility.
@@ -376,8 +348,6 @@ dnl -lpthread (gcc) Y
dnl
dnl Cygwin posix -lpthread Y OK
dnl
-dnl Any of the above pth -lpth 0.0
-dnl
dnl Mingw windows N OK
dnl
dnl BeOS 5 --
diff --git a/m4/threads.m4 b/m4/threads.m4
index 1aebb0a..f5f587c 100644
--- a/m4/threads.m4
+++ b/m4/threads.m4
@@ -1,4 +1,4 @@
-# threads.m4 serial 4
+# threads.m4 serial 5
dnl Copyright (C) 2019 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -16,12 +16,6 @@ AC_DEFUN([gl_THREADS_H],
AC_REQUIRE([gl_THREADLIB_BODY])
AC_REQUIRE([gl_YIELD])
- if test "$gl_use_threads" = pth; then
- AC_MSG_ERROR([You cannot use --enable-threads=pth with the gnulib module
'threads-h'.])
- fi
- dnl Now, since $gl_use_threads is not 'pth', $LTLIBMULTITHREAD and
- dnl $LIBMULTITHREAD have the same value. Only system libraries are needed.
-
gl_CHECK_NEXT_HEADERS([threads.h])
if test $ac_cv_header_threads_h = yes; then
HAVE_THREADS_H=1
diff --git a/tests/test-cond.c b/tests/test-cond.c
index d8f76c6..e8bd472 100644
--- a/tests/test-cond.c
+++ b/tests/test-cond.c
@@ -16,7 +16,7 @@
#include <config.h>
-#if USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS
+#if USE_POSIX_THREADS || USE_WINDOWS_THREADS
/* Which tests to perform.
Uncomment some of these, to verify that all tests crash if no locking
@@ -173,11 +173,6 @@ test_timedcond (void)
int
main ()
{
-#if TEST_PTH_THREADS
- if (!pth_init ())
- abort ();
-#endif
-
#if DO_TEST_COND
printf ("Starting test_cond ..."); fflush (stdout);
test_cond ();
diff --git a/tests/test-lock.c b/tests/test-lock.c
index e3b4ce9..844e5d5 100644
--- a/tests/test-lock.c
+++ b/tests/test-lock.c
@@ -18,14 +18,11 @@
#include <config.h>
-#if USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS
+#if USE_POSIX_THREADS || USE_WINDOWS_THREADS
#if USE_POSIX_THREADS
# define TEST_POSIX_THREADS 1
#endif
-#if USE_PTH_THREADS
-# define TEST_PTH_THREADS 1
-#endif
#if USE_WINDOWS_THREADS
# define TEST_WINDOWS_THREADS 1
#endif
@@ -87,7 +84,6 @@
#if !ENABLE_LOCKING
# undef USE_POSIX_THREADS
-# undef USE_PTH_THREADS
# undef USE_WINDOWS_THREADS
#endif
#include "glthread/lock.h"
@@ -96,9 +92,6 @@
# if TEST_POSIX_THREADS
# define USE_POSIX_THREADS 1
# endif
-# if TEST_PTH_THREADS
-# define USE_PTH_THREADS 1
-# endif
# if TEST_WINDOWS_THREADS
# define USE_WINDOWS_THREADS 1
# endif
@@ -723,11 +716,6 @@ main ()
alarm (alarm_value);
#endif
-#if TEST_PTH_THREADS
- if (!pth_init ())
- abort ();
-#endif
-
#if DO_TEST_LOCK
printf ("Starting test_lock ..."); fflush (stdout);
test_lock ();
diff --git a/tests/test-rwlock1.c b/tests/test-rwlock1.c
index 7180436..fbb54aa 100644
--- a/tests/test-rwlock1.c
+++ b/tests/test-rwlock1.c
@@ -29,7 +29,6 @@
#include <unistd.h>
#include "glthread/thread.h"
-#include "glthread/yield.h"
/* Verify that in a situation where
- an rwlock is taken by a reader and has a writer waiting,
@@ -149,9 +148,6 @@ main ()
/* Job done. Go to sleep. */
for (;;)
{
- /* In cooperative threads implementations (Pth), give other threads
- a chance to run. */
- gl_thread_yield ();
sleep (1);
}
}
diff --git a/tests/test-thread_create.c b/tests/test-thread_create.c
index fbfc561..0465b2b 100644
--- a/tests/test-thread_create.c
+++ b/tests/test-thread_create.c
@@ -67,7 +67,7 @@ main ()
}
else
{
-#if USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS
+#if USE_POSIX_THREADS || USE_WINDOWS_THREADS
fputs ("glthread_create failed\n", stderr);
return 1;
#else
diff --git a/tests/test-tls.c b/tests/test-tls.c
index 302ca18..9babfe6 100644
--- a/tests/test-tls.c
+++ b/tests/test-tls.c
@@ -18,14 +18,11 @@
#include <config.h>
-#if USE_POSIX_THREADS || USE_PTH_THREADS || USE_WINDOWS_THREADS
+#if USE_POSIX_THREADS || USE_WINDOWS_THREADS
#if USE_POSIX_THREADS
# define TEST_POSIX_THREADS 1
#endif
-#if USE_PTH_THREADS
-# define TEST_PTH_THREADS 1
-#endif
#if USE_WINDOWS_THREADS
# define TEST_WINDOWS_THREADS 1
#endif
@@ -67,8 +64,7 @@
static void
perhaps_yield (void)
{
- /* Call yield () only with a certain probability, otherwise with GNU Pth
- the sequence of thread activations is too predictable. */
+ /* This helps making the sequence of thread activations less predictable. */
if ((((unsigned int) rand () >> 3) % 4) == 0)
yield ();
}
@@ -497,11 +493,6 @@ main ()
alarm (alarm_value);
#endif
-#if TEST_PTH_THREADS
- if (!pth_init ())
- abort ();
-#endif
-
printf ("Starting test_tls ..."); fflush (stdout);
test_tls ();
printf (" OK\n"); fflush (stdout);
