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complete upgrade

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1 parent 62f7c79 commit 87d974bb8f4bc210fd6963901954f57cb6deb3fd @ry ry committed Jul 19, 2011
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+/* Copyright Joyent, Inc. and other Node contributors. All rights reserved.
+ *
+ * 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 <assert.h>
+
+#include "uv.h"
+#include "internal.h"
+
+
+/* Atomic set operation on char */
+#ifdef _MSC_VER /* MSVC */
+
+/* _InterlockedOr8 is supported by MSVC on x32 and x64. It is slightly less */
+/* efficient than InterlockedExchange, but InterlockedExchange8 does not */
+/* exist, and interlocked operations on larger targets might require the */
+/* target to be aligned. */
+#pragma intrinsic(_InterlockedOr8)
+
+static char __declspec(inline) uv_atomic_exchange_set(char volatile* target) {
+ return _InterlockedOr8(target, 1);
+}
+
+#else /* GCC */
+
+/* Mingw-32 version, hopefully this works for 64-bit gcc as well. */
+static inline char uv_atomic_exchange_set(char volatile* target) {
+ const char one = 1;
+ char old_value;
+ __asm__ __volatile__ ("lock xchgb %0, %1\n\t"
+ : "=r"(old_value), "=m"(*target)
+ : "0"(one), "m"(*target)
+ : "memory");
+ return old_value;
+}
+
+#endif
+
+
+void uv_async_endgame(uv_async_t* handle) {
+ if (handle->flags & UV_HANDLE_CLOSING &&
+ !handle->async_sent) {
+ assert(!(handle->flags & UV_HANDLE_CLOSED));
+ handle->flags |= UV_HANDLE_CLOSED;
+
+ if (handle->close_cb) {
+ handle->close_cb((uv_handle_t*)handle);
+ }
+
+ uv_unref();
+ }
+}
+
+
+int uv_async_init(uv_async_t* handle, uv_async_cb async_cb) {
+ uv_req_t* req;
+
+ uv_counters()->handle_init++;
+ uv_counters()->async_init++;
+
+ handle->type = UV_ASYNC;
+ handle->flags = 0;
+ handle->async_sent = 0;
+ handle->error = uv_ok_;
+ handle->async_cb = async_cb;
+
+ req = &handle->async_req;
+ uv_req_init(req);
+ req->type = UV_WAKEUP;
+ req->data = handle;
+
+ uv_ref();
+
+ return 0;
+}
+
+
+int uv_async_send(uv_async_t* handle) {
+ if (handle->type != UV_ASYNC) {
+ /* Can't set errno because that's not thread-safe. */
+ return -1;
+ }
+
+ /* The user should make sure never to call uv_async_send to a closing */
+ /* or closed handle. */
+ assert(!(handle->flags & UV_HANDLE_CLOSING));
+
+ if (!uv_atomic_exchange_set(&handle->async_sent)) {
+ if (!PostQueuedCompletionStatus(LOOP->iocp,
+ 0,
+ 0,
+ &handle->async_req.overlapped)) {
+ uv_fatal_error(GetLastError(), "PostQueuedCompletionStatus");
+ }
+ }
+
+ return 0;
+}
+
+
+void uv_process_async_wakeup_req(uv_async_t* handle, uv_req_t* req) {
+ assert(handle->type == UV_ASYNC);
+ assert(req->type == UV_WAKEUP);
+
+ handle->async_sent = 0;
+ if (handle->async_cb) {
+ handle->async_cb((uv_async_t*) handle, 0);
+ }
+ if (handle->flags & UV_HANDLE_CLOSING) {
+ uv_want_endgame((uv_handle_t*)handle);
+ }
+}
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