Condition variable functions in separate DLL

[yaz-moved-to-github.git] / src / condvar.c

diff --git a/src/condvar.c b/src/condvar.c
new file mode 100644 (file)
index 0000000..5bbd92a
--- /dev/null
+++ b/src/condvar.c
@@ -0,0 +1,135 @@
+/* This file is part of the YAZ toolkit.
+ * Copyright (C) 1995-2010 Index Data
+ * See the file LICENSE for details.
+ */
+
+/**
+ * \file condvar.c
+ * \brief Wraps condition variables
+ *
+ */
+#if HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stddef.h>
+#include <yaz/xmalloc.h>
+#include <yaz/nmem.h>
+#include <yaz/log.h>
+#include <yaz/mutex.h>
+#include <yaz/gettimeofday.h>
+#ifdef WIN32
+#include <windows.h>
+#include <sys/timeb.h>
+#endif
+#include <time.h>
+
+#if HAVE_SYS_TIME_H
+#include <sys/time.h>
+#endif
+
+#if YAZ_POSIX_THREADS
+#include <pthread.h>
+#endif
+
+#include "mutex-p.h"
+
+struct yaz_cond {
+#ifdef WIN32
+    CONDITION_VARIABLE cond;
+#elif YAZ_POSIX_THREADS
+    pthread_cond_t cond;
+#endif
+};
+
+void yaz_cond_create(YAZ_COND *p)
+{
+    *p = (YAZ_COND) malloc(sizeof(**p));
+#ifdef WIN32
+    InitializeConditionVariable(&(*p)->cond);
+#elif YAZ_POSIX_THREADS
+    pthread_cond_init(&(*p)->cond, 0);
+#endif
+}
+
+void yaz_cond_destroy(YAZ_COND *p)
+{
+    if (*p)
+    {
+#ifdef WIN32
+#elif YAZ_POSIX_THREADS
+        pthread_cond_destroy(&(*p)->cond);
+#endif
+        free(*p);
+        *p = 0;
+    }
+}
+
+int yaz_cond_wait(YAZ_COND p, YAZ_MUTEX m, const struct timeval *abstime)
+{
+#ifdef WIN32
+    if (abstime)
+    {
+        struct timeval tval_now;
+        int sec, msec;
+
+        yaz_gettimeofday(&tval_now);
+
+        sec = abstime->tv_sec - tval_now.tv_sec;
+        msec = (abstime->tv_usec - tval_now.tv_usec) / 1000;
+        return SleepConditionVariableCS(&p->cond, &m->handle, sec*1000 + msec);
+    }
+    else
+        return SleepConditionVariableCS(&p->cond, &m->handle, INFINITE);
+#elif YAZ_POSIX_THREADS
+    if (abstime)
+    {
+        struct timespec s;
+        s.tv_sec = abstime->tv_sec;
+        s.tv_nsec = abstime->tv_usec * 1000;
+        return pthread_cond_timedwait(&p->cond, &m->handle, &s);
+    }
+    else
+        return pthread_cond_wait(&p->cond, &m->handle);
+#else
+    return -1;
+#endif
+}
+
+int yaz_cond_signal(YAZ_COND p)
+{
+#ifdef WIN32
+    WakeConditionVariable(&p->cond);
+    return 0;
+#elif YAZ_POSIX_THREADS
+    return pthread_cond_signal(&p->cond);
+#else
+    return -1;
+#endif
+}
+
+int yaz_cond_broadcast(YAZ_COND p)
+{
+#ifdef WIN32
+    WakeAllConditionVariable(&p->cond);
+    return 0;
+#elif YAZ_POSIX_THREADS
+    return pthread_cond_broadcast(&p->cond);
+#else
+    return -1;
+#endif
+}
+
+/*
+ * Local variables:
+ * c-basic-offset: 4
+ * c-file-style: "Stroustrup"
+ * indent-tabs-mode: nil
+ * End:
+ * vim: shiftwidth=4 tabstop=8 expandtab
+ */
+