TrackedObjects assumes you can use a "TLS slot" of -1 to indicate uninitialized. This isn't true for the pthread_key_t type, which is unsigned on Linux and reportedly a struct on Macs. This change modifies the Slot type to be a struct containing an "initialized" flag.

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@1113 0039d316-1c4b-4281-b951-d872f2087c98

4 files changed, 19 insertions, 17 deletions

diff --git a/chrome/common/ipc_sync_channel.cc b/chrome/common/ipc_sync_channel.cc
index 25a22c8..3932c6d 100644
--- a/chrome/common/ipc_sync_channel.cc
+++ b/chrome/common/ipc_sync_channel.cc
@@ -57,7 +57,8 @@ namespace IPC {
 // sync message while another one is blocked).
 
 // Holds a pointer to the per-thread ReceivedSyncMsgQueue object.
-static int g_tls_index = ThreadLocalStorage::Alloc();
+// TODO(evanm): this shouldn't rely on static initialization.
+static TLSSlot g_tls_index;
 
 class SyncChannel::ReceivedSyncMsgQueue :
     public base::RefCountedThreadSafe<ReceivedSyncMsgQueue> {
@@ -69,10 +70,10 @@ class SyncChannel::ReceivedSyncMsgQueue :
   }
 
   ~ReceivedSyncMsgQueue() {
-    DCHECK(ThreadLocalStorage::Get(g_tls_index));
+    DCHECK(g_tls_index.Get());
     DCHECK(MessageLoop::current() == listener_message_loop_);
     CloseHandle(blocking_event_);
-    ThreadLocalStorage::Set(g_tls_index, NULL);
+    g_tls_index.Set(NULL);
   }
 
   // Called on IPC thread when a synchronous message or reply arrives.
@@ -237,14 +238,13 @@ SyncChannel::SyncContext::SyncContext(
       reply_deserialize_result_(false) {
   // We want one ReceivedSyncMsgQueue per listener thread (i.e. since multiple
   // SyncChannel objects that can block the same thread).
-  received_sync_msgs_ = static_cast<ReceivedSyncMsgQueue*>(
-      ThreadLocalStorage::Get(g_tls_index));
+  received_sync_msgs_ = static_cast<ReceivedSyncMsgQueue*>(g_tls_index.Get());
 
   if (!received_sync_msgs_) {
     // Stash a pointer to the listener thread's ReceivedSyncMsgQueue, as we
     // need to be able to access it in the IPC thread.
     received_sync_msgs_ = new ReceivedSyncMsgQueue();
-    ThreadLocalStorage::Set(g_tls_index, received_sync_msgs_);
+    g_tls_index.Set(received_sync_msgs_);
   }
 
   // Addref manually so that we can ensure destruction on the listener thread
diff --git a/chrome/common/notification_service.cc b/chrome/common/notification_service.cc
index 672052f..2345ba0 100644
--- a/chrome/common/notification_service.cc
+++ b/chrome/common/notification_service.cc
@@ -29,9 +29,11 @@
 
 #include "chrome/common/notification_service.h"
 
-int NotificationService::tls_index_ = ThreadLocalStorage::Alloc();
+// TODO(evanm): This shouldn't depend on static initialization.
+// static
+TLSSlot NotificationService::tls_index_;
 
-/* static */
+// static
 bool NotificationService::HasKey(const NotificationSourceMap& map,
                                  const NotificationSource& source) {
   return map.find(source.map_key()) != map.end();
@@ -43,7 +45,7 @@ NotificationService::NotificationService() {
   memset(observer_counts_, 0, sizeof(observer_counts_));
 #endif
 
-  ThreadLocalStorage::Set(tls_index_, this);
+  tls_index_.Set(this);
 }
 
 void NotificationService::AddObserver(NotificationObserver* observer,
@@ -117,7 +119,7 @@ void NotificationService::Notify(NotificationType type,
 
 
 NotificationService::~NotificationService() {
-  ThreadLocalStorage::Set(tls_index_, NULL);
+  tls_index_.Set(NULL);
 
 #ifndef NDEBUG
   for (int i = 0; i < NOTIFICATION_TYPE_COUNT; i++) {
diff --git a/chrome/common/notification_service.h b/chrome/common/notification_service.h
index 1243748..6ad58d0 100644
--- a/chrome/common/notification_service.h
+++ b/chrome/common/notification_service.h
@@ -36,8 +36,8 @@
 
 #include <map>
 
-#include "base/thread_local_storage.h"
 #include "base/observer_list.h"
+#include "base/thread_local_storage.h"
 #include "base/values.h"
 #include "chrome/common/notification_details.h"
 #include "chrome/common/notification_source.h"
@@ -50,8 +50,7 @@ class NotificationService {
   // Returns the NotificationService object for the current thread, or NULL if
   // none.
   static NotificationService* current() {
-    return static_cast<NotificationService *>(
-        ThreadLocalStorage::Get(tls_index_));
+    return static_cast<NotificationService *>(tls_index_.Get());
   }
 
   // Normally instantiated when the thread is created.  Not all threads have
@@ -119,7 +118,7 @@ class NotificationService {
 
   // The thread local storage index, used for getting the current thread's
   // instance.
-  static int tls_index_;
+  static TLSSlot tls_index_;
 
 #ifndef NDEBUG
   // Used to check to see that AddObserver and RemoveObserver calls are
diff --git a/chrome/common/rand_util.cc b/chrome/common/rand_util.cc
index 13c586f..d6c2824 100644
--- a/chrome/common/rand_util.cc
+++ b/chrome/common/rand_util.cc
@@ -39,12 +39,13 @@
 
 namespace rand_util {
 
+// TODO(evanm): don't rely on static initialization.
 // Using TLS since srand() needs to be called once in each thread.
-int g_tls_index = ThreadLocalStorage::Alloc();
+TLSSlot g_tls_index;
 
 int RandInt(int min, int max) {
-  if (ThreadLocalStorage::Get(g_tls_index) == 0) {
-    ThreadLocalStorage::Set(g_tls_index, reinterpret_cast<void*>(1));
+  if (g_tls_index.Get() == 0) {
+    g_tls_index.Set(reinterpret_cast<void*>(1));
     TimeDelta now = TimeTicks::UnreliableHighResNow() - TimeTicks();
     unsigned int seed = static_cast<unsigned int>(now.InMicroseconds());
     srand(seed);