Built motion from commit 6a09e18b.|2.6.11

[motion2.git] / legacy-libs / grpc-cloned / deps / grpc / src / core / lib / gprpp / thd_windows.cc

diff --git a/legacy-libs/grpc-cloned/deps/grpc/src/core/lib/gprpp/thd_windows.cc b/legacy-libs/grpc-cloned/deps/grpc/src/core/lib/gprpp/thd_windows.cc
new file mode 100644 (file)
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+++ b/legacy-libs/grpc-cloned/deps/grpc/src/core/lib/gprpp/thd_windows.cc
@@ -0,0 +1,176 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+/* Windows implementation for gpr threads. */
+
+#include <grpc/support/port_platform.h>
+
+#ifdef GPR_WINDOWS
+
+#include "src/core/lib/gprpp/thd.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/thd_id.h>
+#include <string.h>
+
+#include "src/core/lib/gprpp/memory.h"
+
+#if defined(_MSC_VER)
+#define thread_local __declspec(thread)
+#elif defined(__GNUC__)
+#define thread_local __thread
+#else
+#error "Unknown compiler - please file a bug report"
+#endif
+
+namespace {
+class ThreadInternalsWindows;
+struct thd_info {
+  ThreadInternalsWindows* thread;
+  void (*body)(void* arg); /* body of a thread */
+  void* arg;               /* argument to a thread */
+  HANDLE join_event;       /* the join event */
+  bool joinable;           /* whether it is joinable */
+};
+
+thread_local struct thd_info* g_thd_info;
+
+class ThreadInternalsWindows
+    : public grpc_core::internal::ThreadInternalsInterface {
+ public:
+  ThreadInternalsWindows(void (*thd_body)(void* arg), void* arg, bool* success,
+                         const grpc_core::Thread::Options& options)
+      : started_(false) {
+    gpr_mu_init(&mu_);
+    gpr_cv_init(&ready_);
+
+    HANDLE handle;
+    info_ = (struct thd_info*)gpr_malloc(sizeof(*info_));
+    info_->thread = this;
+    info_->body = thd_body;
+    info_->arg = arg;
+    info_->join_event = nullptr;
+    info_->joinable = options.joinable();
+    if (info_->joinable) {
+      info_->join_event = CreateEvent(nullptr, FALSE, FALSE, nullptr);
+      if (info_->join_event == nullptr) {
+        gpr_free(info_);
+        *success = false;
+        return;
+      }
+    }
+
+    if (options.stack_size() != 0) {
+      // Windows will round up the given stack_size value to nearest page.
+      handle = CreateThread(nullptr, options.stack_size(), thread_body, info_,
+                            0, nullptr);
+    } else {
+      handle = CreateThread(nullptr, 64 * 1024, thread_body, info_, 0, nullptr);
+    }
+
+    if (handle == nullptr) {
+      destroy_thread();
+      *success = false;
+    } else {
+      CloseHandle(handle);
+      *success = true;
+    }
+  }
+
+  ~ThreadInternalsWindows() override {
+    gpr_mu_destroy(&mu_);
+    gpr_cv_destroy(&ready_);
+  }
+
+  void Start() override {
+    gpr_mu_lock(&mu_);
+    started_ = true;
+    gpr_cv_signal(&ready_);
+    gpr_mu_unlock(&mu_);
+  }
+
+  void Join() override {
+    DWORD ret = WaitForSingleObject(info_->join_event, INFINITE);
+    GPR_ASSERT(ret == WAIT_OBJECT_0);
+    destroy_thread();
+  }
+
+ private:
+  static DWORD WINAPI thread_body(void* v) {
+    g_thd_info = static_cast<thd_info*>(v);
+    gpr_mu_lock(&g_thd_info->thread->mu_);
+    while (!g_thd_info->thread->started_) {
+      gpr_cv_wait(&g_thd_info->thread->ready_, &g_thd_info->thread->mu_,
+                  gpr_inf_future(GPR_CLOCK_MONOTONIC));
+    }
+    gpr_mu_unlock(&g_thd_info->thread->mu_);
+    if (!g_thd_info->joinable) {
+      grpc_core::Delete(g_thd_info->thread);
+      g_thd_info->thread = nullptr;
+    }
+    g_thd_info->body(g_thd_info->arg);
+    if (g_thd_info->joinable) {
+      BOOL ret = SetEvent(g_thd_info->join_event);
+      GPR_ASSERT(ret);
+    } else {
+      gpr_free(g_thd_info);
+    }
+    return 0;
+  }
+
+  void destroy_thread() {
+    if (info_ != nullptr && info_->joinable) {
+      CloseHandle(info_->join_event);
+    }
+    gpr_free(info_);
+  }
+
+  gpr_mu mu_;
+  gpr_cv ready_;
+  bool started_;
+  thd_info* info_;
+};
+
+}  // namespace
+
+namespace grpc_core {
+
+Thread::Thread(const char* thd_name, void (*thd_body)(void* arg), void* arg,
+               bool* success, const Options& options)
+    : options_(options) {
+  bool outcome = false;
+  impl_ = New<ThreadInternalsWindows>(thd_body, arg, &outcome, options);
+  if (outcome) {
+    state_ = ALIVE;
+  } else {
+    state_ = FAILED;
+    Delete(impl_);
+    impl_ = nullptr;
+  }
+
+  if (success != nullptr) {
+    *success = outcome;
+  }
+}
+
+}  // namespace grpc_core
+
+gpr_thd_id gpr_thd_currentid(void) { return (gpr_thd_id)g_thd_info; }
+
+#endif /* GPR_WINDOWS */