Support base::logging on Windows.
libc++ doesn't support std::mutex and friends for Windows yet, so we
just use a compatibility wrapper for now.
Change-Id: I2413d4c089e7d0fb232444043c6b772153035dab
diff --git a/base/logging.cpp b/base/logging.cpp
index 0142b70..83957b3 100644
--- a/base/logging.cpp
+++ b/base/logging.cpp
@@ -27,12 +27,19 @@
#include <iostream>
#include <limits>
-#include <mutex>
#include <sstream>
#include <string>
#include <utility>
#include <vector>
+#ifndef _WIN32
+#include <mutex>
+#else
+#define NOGDI // Suppress the evil ERROR macro.
+#include <windows.h>
+#endif
+
+#include "base/macros.h"
#include "base/strings.h"
#include "cutils/threads.h"
@@ -45,10 +52,79 @@
#include <unistd.h>
#endif
+namespace {
+#ifndef _WIN32
+using std::mutex;
+using std::lock_guard;
+
+#if defined(__GLIBC__)
+const char* getprogname() {
+ return program_invocation_short_name;
+}
+#endif
+
+#else
+const char* getprogname() {
+ static bool first = true;
+ static char progname[MAX_PATH] = {};
+
+ if (first) {
+ // TODO(danalbert): This is a full path on Windows. Just get the basename.
+ DWORD nchars = GetModuleFileName(nullptr, progname, sizeof(progname));
+ DCHECK_GT(nchars, 0U);
+ first = false;
+ }
+
+ return progname;
+}
+
+class mutex {
+ public:
+ mutex() {
+ semaphore_ = CreateSemaphore(nullptr, 1, 1, nullptr);
+ CHECK(semaphore_ != nullptr) << "Failed to create Mutex";
+ }
+ ~mutex() {
+ CloseHandle(semaphore_);
+ }
+
+ void lock() {
+ DWORD result = WaitForSingleObject(semaphore_, INFINITE);
+ CHECK_EQ(result, WAIT_OBJECT_0) << GetLastError();
+ }
+
+ void unlock() {
+ bool result = ReleaseSemaphore(semaphore_, 1, nullptr);
+ CHECK(result);
+ }
+
+ private:
+ HANDLE semaphore_;
+};
+
+template <typename LockT>
+class lock_guard {
+ public:
+ explicit lock_guard(LockT& lock) : lock_(lock) {
+ lock_.lock();
+ }
+
+ ~lock_guard() {
+ lock_.unlock();
+ }
+
+ private:
+ LockT& lock_;
+
+ DISALLOW_COPY_AND_ASSIGN(lock_guard);
+};
+#endif
+} // namespace
+
namespace android {
namespace base {
-static std::mutex logging_lock;
+static mutex logging_lock;
#ifdef __ANDROID__
static LogFunction gLogger = LogdLogger();
@@ -60,12 +136,6 @@
static LogSeverity gMinimumLogSeverity = INFO;
static std::unique_ptr<std::string> gProgramInvocationName;
-#if defined(__GLIBC__)
-static const char* getprogname() {
- return program_invocation_short_name;
-}
-#endif
-
static const char* ProgramInvocationName() {
if (gProgramInvocationName == nullptr) {
gProgramInvocationName.reset(new std::string(getprogname()));
@@ -182,7 +252,7 @@
}
void SetLogger(LogFunction&& logger) {
- std::lock_guard<std::mutex> lock(logging_lock);
+ lock_guard<mutex> lock(logging_lock);
gLogger = std::move(logger);
}
@@ -287,7 +357,7 @@
void LogMessage::LogLine(const char* file, unsigned int line, LogId id,
LogSeverity severity, const char* message) {
const char* tag = ProgramInvocationName();
- std::lock_guard<std::mutex> lock(logging_lock);
+ lock_guard<mutex> lock(logging_lock);
gLogger(id, severity, tag, file, line, message);
}