1 files changed, 104 insertions, 0 deletions
diff --git a/util/env_test.cc b/util/env_test.cc
new file mode 100644
index 0000000..b72cb44
--- /dev/null
+++ b/util/env_test.cc
@@ -0,0 +1,104 @@
+// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file. See the AUTHORS file for names of contributors.
+
+#include "leveldb/env.h"
+
+#include "port/port.h"
+#include "util/testharness.h"
+
+namespace leveldb {
+
+static const int kDelayMicros = 100000;
+
+class EnvPosixTest {
+ private:
+  port::Mutex mu_;
+  std::string events_;
+
+ public:
+  Env* env_;
+  EnvPosixTest() : env_(Env::Default()) { }
+};
+
+static void SetBool(void* ptr) {
+  reinterpret_cast<port::AtomicPointer*>(ptr)->NoBarrier_Store(ptr);
+}
+
+TEST(EnvPosixTest, RunImmediately) {
+  port::AtomicPointer called (NULL);
+  env_->Schedule(&SetBool, &called);
+  Env::Default()->SleepForMicroseconds(kDelayMicros);
+  ASSERT_TRUE(called.NoBarrier_Load() != NULL);
+}
+
+TEST(EnvPosixTest, RunMany) {
+  port::AtomicPointer last_id (NULL);
+
+  struct CB {
+    port::AtomicPointer* last_id_ptr;   // Pointer to shared slot
+    uintptr_t id;             // Order# for the execution of this callback
+
+    CB(port::AtomicPointer* p, int i) : last_id_ptr(p), id(i) { }
+
+    static void Run(void* v) {
+      CB* cb = reinterpret_cast<CB*>(v);
+      void* cur = cb->last_id_ptr->NoBarrier_Load();
+      ASSERT_EQ(cb->id-1, reinterpret_cast<uintptr_t>(cur));
+      cb->last_id_ptr->Release_Store(reinterpret_cast<void*>(cb->id));
+    }
+  };
+
+  // Schedule in different order than start time
+  CB cb1(&last_id, 1);
+  CB cb2(&last_id, 2);
+  CB cb3(&last_id, 3);
+  CB cb4(&last_id, 4);
+  env_->Schedule(&CB::Run, &cb1);
+  env_->Schedule(&CB::Run, &cb2);
+  env_->Schedule(&CB::Run, &cb3);
+  env_->Schedule(&CB::Run, &cb4);
+
+  Env::Default()->SleepForMicroseconds(kDelayMicros);
+  void* cur = last_id.Acquire_Load();
+  ASSERT_EQ(4, reinterpret_cast<uintptr_t>(cur));
+}
+
+struct State {
+  port::Mutex mu;
+  int val;
+  int num_running;
+};
+
+static void ThreadBody(void* arg) {
+  State* s = reinterpret_cast<State*>(arg);
+  s->mu.Lock();
+  s->val += 1;
+  s->num_running -= 1;
+  s->mu.Unlock();
+}
+
+TEST(EnvPosixTest, StartThread) {
+  State state;
+  state.val = 0;
+  state.num_running = 3;
+  for (int i = 0; i < 3; i++) {
+    env_->StartThread(&ThreadBody, &state);
+  }
+  while (true) {
+    state.mu.Lock();
+    int num = state.num_running;
+    state.mu.Unlock();
+    if (num == 0) {
+      break;
+    }
+    Env::Default()->SleepForMicroseconds(kDelayMicros);
+  }
+  ASSERT_EQ(state.val, 3);
+}
+
+}  // namespace leveldb
+
+int main(int argc, char** argv) {
+  return leveldb::test::RunAllTests();
+}