externals: Add zycore

Merge commit '80d62f224900ab486a5bc5a6e80ce1e25a0e38e8' as 'externals/zycore'

externals/zycore/src/API/Thread.c

@@ -0,0 +1,194 @@
+/***************************************************************************************************
+
+  Zyan Core Library (Zycore-C)
+
+  Original Author : Florian Bernd
+
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+
+***************************************************************************************************/
+
+#include <Zycore/API/Thread.h>
+
+/* ============================================================================================== */
+/* Internal functions                                                                             */
+/* ============================================================================================== */
+
+/* ---------------------------------------------------------------------------------------------- */
+/*                                                                                                */
+/* ---------------------------------------------------------------------------------------------- */
+
+
+
+/* ---------------------------------------------------------------------------------------------- */
+
+/* ============================================================================================== */
+/* Exported functions                                                                             */
+/* ============================================================================================== */
+
+#if   defined(ZYAN_POSIX)
+
+#include <errno.h>
+
+/* ---------------------------------------------------------------------------------------------- */
+/* General                                                                                        */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZyanThreadGetCurrentThread(ZyanThread* thread)
+{
+    *thread = pthread_self();
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZYAN_STATIC_ASSERT(sizeof(ZyanThreadId) <= sizeof(ZyanU64));
+ZyanStatus ZyanThreadGetCurrentThreadId(ZyanThreadId* thread_id)
+{
+    // TODO: Use `pthread_getthreadid_np` on platforms where it is available
+
+    pthread_t ptid = pthread_self();
+    *thread_id = *(ZyanThreadId*)ptid;
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Thread Local Storage                                                                           */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZyanThreadTlsAlloc(ZyanThreadTlsIndex* index, ZyanThreadTlsCallback destructor)
+{
+    ZyanThreadTlsIndex value;
+    const int error = pthread_key_create(&value, destructor);
+    if (error != 0)
+    {
+        if (error == EAGAIN)
+        {
+            return ZYAN_STATUS_OUT_OF_RESOURCES;
+        }
+        if (error == ENOMEM)
+        {
+            return ZYAN_STATUS_NOT_ENOUGH_MEMORY;
+        }
+        return ZYAN_STATUS_BAD_SYSTEMCALL;
+    }
+
+    *index = value;
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZyanThreadTlsFree(ZyanThreadTlsIndex index)
+{
+    return !pthread_key_delete(index) ? ZYAN_STATUS_SUCCESS : ZYAN_STATUS_BAD_SYSTEMCALL;
+}
+
+ZyanStatus ZyanThreadTlsGetValue(ZyanThreadTlsIndex index, void** data)
+{
+    *data = pthread_getspecific(index);
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZyanThreadTlsSetValue(ZyanThreadTlsIndex index, void* data)
+{
+    const int error = pthread_setspecific(index, data);
+    if (error != 0)
+    {
+        if (error == EINVAL)
+        {
+            return ZYAN_STATUS_INVALID_ARGUMENT;
+        }
+        return ZYAN_STATUS_BAD_SYSTEMCALL;
+    }
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+
+#elif defined(ZYAN_WINDOWS)
+
+/* ---------------------------------------------------------------------------------------------- */
+/* General                                                                                        */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZyanThreadGetCurrentThread(ZyanThread* thread)
+{
+    *thread = GetCurrentThread();
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZyanThreadGetCurrentThreadId(ZyanThreadId* thread_id)
+{
+    *thread_id = GetCurrentThreadId();
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+/* Thread Local Storage (TLS)                                                                     */
+/* ---------------------------------------------------------------------------------------------- */
+
+ZyanStatus ZyanThreadTlsAlloc(ZyanThreadTlsIndex* index, ZyanThreadTlsCallback destructor)
+{
+    const ZyanThreadTlsIndex value = FlsAlloc(destructor);
+    if (value == FLS_OUT_OF_INDEXES)
+    {
+        return ZYAN_STATUS_OUT_OF_RESOURCES;
+    }
+
+    *index = value;
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZyanThreadTlsFree(ZyanThreadTlsIndex index)
+{
+    return FlsFree(index) ? ZYAN_STATUS_SUCCESS : ZYAN_STATUS_BAD_SYSTEMCALL;
+}
+
+ZyanStatus ZyanThreadTlsGetValue(ZyanThreadTlsIndex index, void** data)
+{
+    *data = FlsGetValue(index);
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+ZyanStatus ZyanThreadTlsSetValue(ZyanThreadTlsIndex index, void* data)
+{
+    if (!FlsSetValue(index, data))
+    {
+        const DWORD error = GetLastError();
+        if (error == ERROR_INVALID_PARAMETER)
+        {
+            return ZYAN_STATUS_INVALID_ARGUMENT;
+        }
+        return ZYAN_STATUS_BAD_SYSTEMCALL;
+    }
+
+    return ZYAN_STATUS_SUCCESS;
+}
+
+/* ---------------------------------------------------------------------------------------------- */
+
+#else
+#   error "Unsupported platform detected"
+#endif
+
+/* ============================================================================================== */