1 files changed, 127 insertions, 0 deletions
diff --git a/src/mercury/mercury_thread_mutex.h b/src/mercury/mercury_thread_mutex.h
new file mode 100644
index 0000000..fe54a0c
--- /dev/null
+++ b/src/mercury/mercury_thread_mutex.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2013-2019 Argonne National Laboratory, Department of Energy,
+ *                    UChicago Argonne, LLC and The HDF Group.
+ * All rights reserved.
+ *
+ * The full copyright notice, including terms governing use, modification,
+ * and redistribution, is contained in the COPYING file that can be
+ * found at the root of the source code distribution tree.
+ */
+
+#ifndef MERCURY_THREAD_MUTEX_H
+#define MERCURY_THREAD_MUTEX_H
+
+#include "mercury_util_config.h"
+
+#ifdef _WIN32
+#    include <windows.h>
+#    define HG_THREAD_MUTEX_INITIALIZER NULL
+typedef CRITICAL_SECTION hg_thread_mutex_t;
+#else
+#    include <pthread.h>
+#    define HG_THREAD_MUTEX_INITIALIZER PTHREAD_MUTEX_INITIALIZER
+typedef pthread_mutex_t hg_thread_mutex_t;
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * Initialize the mutex.
+ *
+ * \param mutex [IN/OUT]        pointer to mutex object
+ *
+ * \return Non-negative on success or negative on failure
+ */
+HG_UTIL_PUBLIC int
+hg_thread_mutex_init(hg_thread_mutex_t *mutex);
+
+/**
+ * Destroy the mutex.
+ *
+ * \param mutex [IN/OUT]        pointer to mutex object
+ *
+ * \return Non-negative on success or negative on failure
+ */
+HG_UTIL_PUBLIC int
+hg_thread_mutex_destroy(hg_thread_mutex_t *mutex);
+
+/**
+ * Lock the mutex.
+ *
+ * \param mutex [IN/OUT]        pointer to mutex object
+ *
+ * \return Non-negative on success or negative on failure
+ */
+static HG_UTIL_INLINE int
+hg_thread_mutex_lock(hg_thread_mutex_t *mutex);
+
+/**
+ * Try locking the mutex.
+ *
+ * \param mutex [IN/OUT]        pointer to mutex object
+ *
+ * \return Non-negative on success or negative on failure
+ */
+static HG_UTIL_INLINE int
+hg_thread_mutex_try_lock(hg_thread_mutex_t *mutex);
+
+/**
+ * Unlock the mutex.
+ *
+ * \param mutex [IN/OUT]        pointer to mutex object
+ *
+ * \return Non-negative on success or negative on failure
+ */
+static HG_UTIL_INLINE int
+hg_thread_mutex_unlock(hg_thread_mutex_t *mutex);
+
+/*---------------------------------------------------------------------------*/
+static HG_UTIL_INLINE int
+hg_thread_mutex_lock(hg_thread_mutex_t *mutex)
+{
+#ifdef _WIN32
+    EnterCriticalSection(mutex);
+#else
+    if (pthread_mutex_lock(mutex))
+        return HG_UTIL_FAIL;
+#endif
+
+    return HG_UTIL_SUCCESS;
+}
+
+/*---------------------------------------------------------------------------*/
+static HG_UTIL_INLINE int
+hg_thread_mutex_try_lock(hg_thread_mutex_t *mutex)
+{
+#ifdef _WIN32
+    if (!TryEnterCriticalSection(mutex))
+        return HG_UTIL_FAIL;
+#else
+    if (pthread_mutex_trylock(mutex))
+        return HG_UTIL_FAIL;
+#endif
+
+    return HG_UTIL_SUCCESS;
+}
+
+/*---------------------------------------------------------------------------*/
+static HG_UTIL_INLINE int
+hg_thread_mutex_unlock(hg_thread_mutex_t *mutex)
+{
+#ifdef _WIN32
+    LeaveCriticalSection(mutex);
+#else
+    if (pthread_mutex_unlock(mutex))
+        return HG_UTIL_FAIL;
+#endif
+
+    return HG_UTIL_SUCCESS;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* MERCURY_THREAD_MUTEX_H */