complete upgrade

deps/uv/src/win/async.c

@@ -0,0 +1,129 @@
+/* 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);
+  }
+}