Adding upstream version 9.1.upstream/9.1upstream

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

1 files changed, 199 insertions, 0 deletions

diff --git a/lib/pthread-cond.c b/lib/pthread-cond.c
new file mode 100644
index 0000000..06608f3
--- /dev/null
+++ b/lib/pthread-cond.c
@@ -0,0 +1,199 @@
+/* POSIX condition variables.
+   Copyright (C) 2010-2022 Free Software Foundation, Inc.
+
+   This file is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as
+   published by the Free Software Foundation; either version 2.1 of the
+   License, or (at your option) any later version.
+
+   This file 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 Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser 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-thread.h"
+#else
+# include <errno.h>
+# include <limits.h>
+# include <sys/time.h>
+# include <time.h>
+#endif
+
+#if ((defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS) || !HAVE_PTHREAD_H
+
+int
+pthread_condattr_init (pthread_condattr_t *attr)
+{
+  *attr = 0;
+  return 0;
+}
+
+int
+pthread_condattr_destroy (_GL_UNUSED pthread_condattr_t *attr)
+{
+  return 0;
+}
+
+#endif
+
+#if (defined _WIN32 && ! defined __CYGWIN__) && USE_WINDOWS_THREADS
+/* Use Windows threads.  */
+
+int
+pthread_cond_init (pthread_cond_t *cond,
+                   _GL_UNUSED const pthread_condattr_t *attr)
+{
+  return glwthread_cond_init (cond);
+}
+
+int
+pthread_cond_wait (pthread_cond_t *cond, pthread_mutex_t *mutex)
+{
+  return glwthread_cond_wait (cond, mutex,
+                              (int (*) (void *)) pthread_mutex_lock,
+                              (int (*) (void *)) pthread_mutex_unlock);
+}
+
+int
+pthread_cond_timedwait (pthread_cond_t *cond, pthread_mutex_t *mutex,
+                        const struct timespec *abstime)
+{
+  return glwthread_cond_timedwait (cond, mutex,
+                                   (int (*) (void *)) pthread_mutex_lock,
+                                   (int (*) (void *)) pthread_mutex_unlock,
+                                   abstime);
+}
+
+int
+pthread_cond_signal (pthread_cond_t *cond)
+{
+  return glwthread_cond_signal (cond);
+}
+
+int
+pthread_cond_broadcast (pthread_cond_t *cond)
+{
+  return glwthread_cond_broadcast (cond);
+}
+
+int
+pthread_cond_destroy (pthread_cond_t *cond)
+{
+  return glwthread_cond_destroy (cond);
+}
+
+#elif HAVE_PTHREAD_H
+/* Provide workarounds for POSIX threads.  */
+
+#else
+/* Provide a dummy implementation for single-threaded applications.  */
+
+int
+pthread_cond_init (_GL_UNUSED pthread_cond_t *cond,
+                   _GL_UNUSED const pthread_condattr_t *attr)
+{
+  /* COND is never seriously used.  */
+  return 0;
+}
+
+int
+pthread_cond_wait (_GL_UNUSED pthread_cond_t *cond,
+                   _GL_UNUSED pthread_mutex_t *mutex)
+{
+  /* No other thread can signal this condition variable.
+     Wait endlessly.  */
+  for (;;)
+    {
+      struct timespec duration;
+
+      duration.tv_sec = 86400;
+      duration.tv_nsec = 0;
+      nanosleep (&duration, NULL);
+    }
+}
+
+int
+pthread_cond_timedwait (_GL_UNUSED pthread_cond_t *cond,
+                        _GL_UNUSED pthread_mutex_t *mutex,
+                        const struct timespec *abstime)
+{
+  /* No other thread can signal this condition variable.
+     Wait until ABSTIME is reached.  */
+  for (;;)
+    {
+      struct timeval currtime;
+      unsigned long remaining;
+      struct timespec duration;
+
+      gettimeofday (&currtime, NULL);
+
+      if (currtime.tv_sec > abstime->tv_sec)
+        remaining = 0;
+      else
+        {
+          unsigned long seconds = abstime->tv_sec - currtime.tv_sec;
+          remaining = seconds * 1000000000;
+          if (remaining / 1000000000 != seconds) /* overflow? */
+            remaining = ULONG_MAX;
+          else
+            {
+              long nanoseconds =
+                abstime->tv_nsec - currtime.tv_usec * 1000;
+              if (nanoseconds >= 0)
+                {
+                  remaining += nanoseconds;
+                  if (remaining < nanoseconds) /* overflow? */
+                    remaining = ULONG_MAX;
+                }
+              else
+                {
+                  if (remaining >= - nanoseconds)
+                    remaining -= (- nanoseconds);
+                  else
+                    remaining = 0;
+                }
+            }
+        }
+      if (remaining == 0)
+        return ETIMEDOUT;
+
+      /* Sleep up to REMAINING ns.  */
+      duration.tv_sec = remaining / 1000000000;
+      duration.tv_nsec = remaining % 1000000000;
+      nanosleep (&duration, NULL);
+    }
+}
+
+int
+pthread_cond_signal (_GL_UNUSED pthread_cond_t *cond)
+{
+  /* No threads can currently be blocked on COND.  */
+  return 0;
+}
+
+int
+pthread_cond_broadcast (_GL_UNUSED pthread_cond_t *cond)
+{
+  /* No threads can currently be blocked on COND.  */
+  return 0;
+}
+
+int
+pthread_cond_destroy (_GL_UNUSED pthread_cond_t *cond)
+{
+  /* COND is never seriously used.  */
+  return 0;
+}
+
+#endif