1 files changed, 93 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/timer_custom.cc b/src/core/lib/iomgr/timer_custom.cc
new file mode 100644
index 0000000000..71d825ff9f
--- /dev/null
+++ b/src/core/lib/iomgr/timer_custom.cc
@@ -0,0 +1,93 @@
+/*
+ *
+ * Copyright 2017 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.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+
+#include "src/core/lib/debug/trace.h"
+#include "src/core/lib/iomgr/iomgr_custom.h"
+#include "src/core/lib/iomgr/timer.h"
+#include "src/core/lib/iomgr/timer_custom.h"
+
+static grpc_custom_timer_vtable* custom_timer_impl;
+
+void grpc_custom_timer_callback(grpc_custom_timer* t, grpc_error* error) {
+  GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
+  grpc_core::ExecCtx exec_ctx;
+  grpc_timer* timer = t->original;
+  GPR_ASSERT(timer->pending);
+  timer->pending = 0;
+  GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_NONE);
+  custom_timer_impl->stop(t);
+  gpr_free(t);
+}
+
+static void timer_init(grpc_timer* timer, grpc_millis deadline,
+                       grpc_closure* closure) {
+  uint64_t timeout;
+  GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
+  grpc_millis now = grpc_core::ExecCtx::Get()->Now();
+  if (deadline <= grpc_core::ExecCtx::Get()->Now()) {
+    GRPC_CLOSURE_SCHED(closure, GRPC_ERROR_NONE);
+    timer->pending = false;
+    return;
+  } else {
+    timeout = deadline - now;
+  }
+  timer->pending = true;
+  timer->closure = closure;
+  grpc_custom_timer* timer_wrapper =
+      (grpc_custom_timer*)gpr_malloc(sizeof(grpc_custom_timer));
+  timer_wrapper->timeout_ms = timeout;
+  timer->custom_timer = (void*)timer_wrapper;
+  timer_wrapper->original = timer;
+  custom_timer_impl->start(timer_wrapper);
+}
+
+static void timer_cancel(grpc_timer* timer) {
+  GRPC_CUSTOM_IOMGR_ASSERT_SAME_THREAD();
+  grpc_custom_timer* tw = (grpc_custom_timer*)timer->custom_timer;
+  if (timer->pending) {
+    timer->pending = 0;
+    GRPC_CLOSURE_SCHED(timer->closure, GRPC_ERROR_CANCELLED);
+    custom_timer_impl->stop(tw);
+    gpr_free(tw);
+  }
+}
+
+static grpc_timer_check_result timer_check(grpc_millis* next) {
+  return GRPC_TIMERS_NOT_CHECKED;
+}
+
+static void timer_list_init() {}
+static void timer_list_shutdown() {}
+
+static void timer_consume_kick(void) {}
+
+static grpc_timer_vtable custom_timer_vtable = {
+    timer_init,      timer_cancel,        timer_check,
+    timer_list_init, timer_list_shutdown, timer_consume_kick};
+
+void grpc_custom_timer_init(grpc_custom_timer_vtable* impl) {
+  custom_timer_impl = impl;
+  grpc_set_timer_impl(&custom_timer_vtable);
+}