Adding upstream version 8.32.upstream/8.32upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 258 insertions, 0 deletions

diff --git a/lib/pthread-mutex.c b/lib/pthread-mutex.c
new file mode 100644
index 0000000..1f66a92
--- /dev/null
+++ b/lib/pthread-mutex.c
@@ -0,0 +1,258 @@
+/* POSIX mutexes (locks).
+   Copyright (C) 2010-2020 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, see <https://www.gnu.org/licenses/>.  */
+
+/* Written by Paul Eggert, 2010, and Bruno Haible <bruno@clisp.org>, 2019.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <pthread.h>
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+# include "windows-timedmutex.h"
+# include "windows-timedrecmutex.h"
+#else
+# include <stdlib.h>
+#endif
+
+#if ((defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS) || !HAVE_PTHREAD_H
+
+int
+pthread_mutexattr_init (pthread_mutexattr_t *attr)
+{
+  *attr = (PTHREAD_MUTEX_STALLED << 2) | PTHREAD_MUTEX_DEFAULT;
+  return 0;
+}
+
+int
+pthread_mutexattr_gettype (const pthread_mutexattr_t *attr, int *typep)
+{
+  *typep = *attr & (PTHREAD_MUTEX_DEFAULT | PTHREAD_MUTEX_NORMAL
+                    | PTHREAD_MUTEX_ERRORCHECK | PTHREAD_MUTEX_RECURSIVE);
+  return 0;
+}
+
+int
+pthread_mutexattr_settype (pthread_mutexattr_t *attr, int type)
+{
+  if (!(type == PTHREAD_MUTEX_DEFAULT
+        || type == PTHREAD_MUTEX_NORMAL
+        || type == PTHREAD_MUTEX_ERRORCHECK
+        || type == PTHREAD_MUTEX_RECURSIVE))
+    return EINVAL;
+  *attr ^= (*attr ^ type)
+           & (PTHREAD_MUTEX_DEFAULT | PTHREAD_MUTEX_NORMAL
+              | PTHREAD_MUTEX_ERRORCHECK | PTHREAD_MUTEX_RECURSIVE);
+  return 0;
+}
+
+int
+pthread_mutexattr_getrobust (const pthread_mutexattr_t *attr, int *robustp)
+{
+  *robustp = (*attr >> 2) & (PTHREAD_MUTEX_STALLED | PTHREAD_MUTEX_ROBUST);
+  return 0;
+}
+
+int
+pthread_mutexattr_setrobust (pthread_mutexattr_t *attr, int robust)
+{
+  if (!(robust == PTHREAD_MUTEX_STALLED || robust == PTHREAD_MUTEX_ROBUST))
+    return EINVAL;
+  *attr ^= (*attr ^ (robust << 2))
+           & ((PTHREAD_MUTEX_STALLED | PTHREAD_MUTEX_ROBUST) << 2);
+  return 0;
+}
+
+int
+pthread_mutexattr_destroy (pthread_mutexattr_t *attr _GL_UNUSED)
+{
+  return 0;
+}
+
+#elif PTHREAD_MUTEXATTR_ROBUST_UNIMPLEMENTED
+
+int
+pthread_mutexattr_getrobust (const pthread_mutexattr_t *attr, int *robustp)
+{
+  *robustp = PTHREAD_MUTEX_STALLED;
+  return 0;
+}
+
+int
+pthread_mutexattr_setrobust (pthread_mutexattr_t *attr, int robust)
+{
+  if (!(robust == PTHREAD_MUTEX_STALLED || robust == PTHREAD_MUTEX_ROBUST))
+    return EINVAL;
+  if (!(robust == PTHREAD_MUTEX_STALLED))
+    return ENOTSUP;
+  return 0;
+}
+
+#endif
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+/* Use Windows threads.  */
+
+int
+pthread_mutex_init (pthread_mutex_t *mutex, const pthread_mutexattr_t *attr)
+{
+  /* This implementation does not support PTHREAD_MUTEX_ERRORCHECK
+     and ignores the 'robust' attribute.  */
+  if (attr != NULL
+      && (*attr & (PTHREAD_MUTEX_DEFAULT | PTHREAD_MUTEX_NORMAL
+                   | PTHREAD_MUTEX_ERRORCHECK | PTHREAD_MUTEX_RECURSIVE))
+         == PTHREAD_MUTEX_RECURSIVE)
+    {
+      mutex->type = 2;
+      return glwthread_timedrecmutex_init (&mutex->u.u_timedrecmutex);
+    }
+  else
+    {
+      mutex->type = 1;
+      return glwthread_timedmutex_init (&mutex->u.u_timedmutex);
+    }
+}
+
+int
+pthread_mutex_lock (pthread_mutex_t *mutex)
+{
+  switch (mutex->type)
+    {
+    case 1:
+      return glwthread_timedmutex_lock (&mutex->u.u_timedmutex);
+    case 2:
+      return glwthread_timedrecmutex_lock (&mutex->u.u_timedrecmutex);
+    default:
+      abort ();
+    }
+}
+
+int
+pthread_mutex_trylock (pthread_mutex_t *mutex)
+{
+  switch (mutex->type)
+    {
+    case 1:
+      return glwthread_timedmutex_trylock (&mutex->u.u_timedmutex);
+    case 2:
+      return glwthread_timedrecmutex_trylock (&mutex->u.u_timedrecmutex);
+    default:
+      abort ();
+    }
+}
+
+int
+pthread_mutex_timedlock (pthread_mutex_t *mutex, const struct timespec *abstime)
+{
+  switch (mutex->type)
+    {
+    case 1:
+      return glwthread_timedmutex_timedlock (&mutex->u.u_timedmutex, abstime);
+    case 2:
+      return glwthread_timedrecmutex_timedlock (&mutex->u.u_timedrecmutex,
+                                                abstime);
+    default:
+      abort ();
+    }
+}
+
+int
+pthread_mutex_unlock (pthread_mutex_t *mutex)
+{
+  switch (mutex->type)
+    {
+    case 1:
+      return glwthread_timedmutex_unlock (&mutex->u.u_timedmutex);
+    case 2:
+      return glwthread_timedrecmutex_unlock (&mutex->u.u_timedrecmutex);
+    default:
+      abort ();
+    }
+}
+
+int
+pthread_mutex_destroy (pthread_mutex_t *mutex)
+{
+  switch (mutex->type)
+    {
+    case 1:
+      return glwthread_timedmutex_destroy (&mutex->u.u_timedmutex);
+    case 2:
+      return glwthread_timedrecmutex_destroy (&mutex->u.u_timedrecmutex);
+    default:
+      abort ();
+    }
+}
+
+#elif HAVE_PTHREAD_H
+/* Provide workarounds for POSIX threads.  */
+
+/* pthread_mutex_timedlock is defined by the 'pthread_mutex_timedlock'
+   module.  */
+
+#else
+/* Provide a dummy implementation for single-threaded applications.  */
+
+int
+pthread_mutex_init (pthread_mutex_t *mutex _GL_UNUSED,
+                    const pthread_mutexattr_t *attr _GL_UNUSED)
+{
+  /* MUTEX is never seriously used.  */
+  return 0;
+}
+
+int
+pthread_mutex_lock (pthread_mutex_t *mutex _GL_UNUSED)
+{
+  /* There is only one thread, so it always gets the lock.  This
+     implementation does not support PTHREAD_MUTEX_ERRORCHECK.  */
+  return 0;
+}
+
+int
+pthread_mutex_trylock (pthread_mutex_t *mutex _GL_UNUSED)
+{
+  /* There is only one thread, so it always gets the lock.  This
+     implementation does not support PTHREAD_MUTEX_ERRORCHECK.  */
+  return 0;
+}
+
+int
+pthread_mutex_timedlock (pthread_mutex_t *mutex _GL_UNUSED,
+                         const struct timespec *abstime _GL_UNUSED)
+{
+  /* There is only one thread, so it always gets the lock.  This
+     implementation does not support PTHREAD_MUTEX_ERRORCHECK.  */
+  return 0;
+}
+
+int
+pthread_mutex_unlock (pthread_mutex_t *mutex _GL_UNUSED)
+{
+  /* There is only one thread, so it always unlocks successfully.
+     This implementation does not support robust mutexes or
+     PTHREAD_MUTEX_ERRORCHECK.  */
+  return 0;
+}
+
+int
+pthread_mutex_destroy (pthread_mutex_t *mutex _GL_UNUSED)
+{
+  /* MUTEX is never seriously used.  */
+  return 0;
+}
+
+#endif