From 7c117281bc8d53d9d6a1e3a9ff9760a5a5b44cf8 Mon Sep 17 00:00:00 2001
From: "Thiago Marcos P. Santos" <thiago@mapbox.com>
Date: Wed, 3 Aug 2016 19:24:04 +0300
Subject: [core] Isolate pthread-based tls implementation

---
 platform/android/config.cmake     |  1 +
 platform/default/thread_local.cpp | 62 +++++++++++++++++++++++++++++++++++++++
 platform/ios/config.cmake         |  1 +
 platform/linux/config.cmake       |  1 +
 platform/macos/config.cmake       |  1 +
 platform/qt/qt.cmake              |  3 ++
 6 files changed, 69 insertions(+)
 create mode 100644 platform/default/thread_local.cpp

(limited to 'platform')

diff --git a/platform/android/config.cmake b/platform/android/config.cmake
index a7370da5fd..5a6950a23f 100644
--- a/platform/android/config.cmake
+++ b/platform/android/config.cmake
@@ -55,6 +55,7 @@ macro(mbgl_platform_core)
         PRIVATE platform/android/src/thread.cpp
         PRIVATE platform/default/string_stdlib.cpp
         PRIVATE platform/default/bidi.cpp
+        PRIVATE platform/default/thread_local.cpp
         PRIVATE platform/default/utf.cpp
 
         # Image handling
diff --git a/platform/default/thread_local.cpp b/platform/default/thread_local.cpp
new file mode 100644
index 0000000000..b754a04b7d
--- /dev/null
+++ b/platform/default/thread_local.cpp
@@ -0,0 +1,62 @@
+#include <mbgl/util/thread_local.hpp>
+
+#include <mbgl/map/backend_scope.hpp>
+#include <mbgl/util/logging.hpp>
+#include <mbgl/util/run_loop.hpp>
+
+#include <stdexcept>
+#include <cassert>
+
+#include <pthread.h>
+
+namespace mbgl {
+namespace util {
+
+template <class T>
+class ThreadLocal<T>::Impl {
+public:
+    pthread_key_t key;
+};
+
+template <class T>
+ThreadLocal<T>::ThreadLocal() : impl(std::make_unique<Impl>()) {
+    int ret = pthread_key_create(&impl->key, [](void *) {});
+
+    if (ret) {
+        throw std::runtime_error("Failed to init local storage key.");
+    }
+}
+
+template <class T>
+ThreadLocal<T>::~ThreadLocal() {
+    delete get();
+
+    if (pthread_key_delete(impl->key)) {
+        Log::Error(Event::General, "Failed to delete local storage key.");
+        assert(false);
+    }
+}
+
+template <class T>
+T* ThreadLocal<T>::get() {
+    auto* ret = reinterpret_cast<T*>(pthread_getspecific(impl->key));
+    if (!ret) {
+        return nullptr;
+    }
+
+    return ret;
+}
+
+template <class T>
+void ThreadLocal<T>::set(T* ptr) {
+    if (pthread_setspecific(impl->key, ptr)) {
+        throw std::runtime_error("Failed to set local storage.");
+    }
+}
+
+template class ThreadLocal<RunLoop>;
+template class ThreadLocal<BackendScope>;
+template class ThreadLocal<int>; // For unit tests
+
+} // namespace util
+} // namespace mbgl
diff --git a/platform/ios/config.cmake b/platform/ios/config.cmake
index fdb286a6d1..401a0e202a 100644
--- a/platform/ios/config.cmake
+++ b/platform/ios/config.cmake
@@ -41,6 +41,7 @@ macro(mbgl_platform_core)
         PRIVATE platform/darwin/src/nsthread.mm
         PRIVATE platform/darwin/src/string_nsstring.mm
         PRIVATE platform/default/bidi.cpp
+        PRIVATE platform/default/thread_local.cpp
         PRIVATE platform/default/utf.cpp
 
         # Image handling
diff --git a/platform/linux/config.cmake b/platform/linux/config.cmake
index 41e7f71b99..d16842c201 100644
--- a/platform/linux/config.cmake
+++ b/platform/linux/config.cmake
@@ -69,6 +69,7 @@ macro(mbgl_platform_core)
         PRIVATE platform/default/string_stdlib.cpp
         PRIVATE platform/default/thread.cpp
         PRIVATE platform/default/bidi.cpp
+        PRIVATE platform/default/thread_local.cpp
         PRIVATE platform/default/utf.cpp
 
         # Image handling
diff --git a/platform/macos/config.cmake b/platform/macos/config.cmake
index 8dc3c38245..e0edc90a6a 100644
--- a/platform/macos/config.cmake
+++ b/platform/macos/config.cmake
@@ -37,6 +37,7 @@ macro(mbgl_platform_core)
         PRIVATE platform/darwin/src/nsthread.mm
         PRIVATE platform/darwin/src/string_nsstring.mm
         PRIVATE platform/default/bidi.cpp
+        PRIVATE platform/default/thread_local.cpp
         PRIVATE platform/default/utf.cpp
 
         # Image handling
diff --git a/platform/qt/qt.cmake b/platform/qt/qt.cmake
index e5b96bfe93..9febee88b5 100644
--- a/platform/qt/qt.cmake
+++ b/platform/qt/qt.cmake
@@ -36,6 +36,9 @@ set(MBGL_QT_FILES
     PRIVATE platform/default/mbgl/util/default_thread_pool.cpp
     PRIVATE platform/default/mbgl/util/default_thread_pool.hpp
 
+    # Thread
+    PRIVATE platform/default/thread_local.cpp
+
     # Platform integration
     PRIVATE platform/qt/src/async_task.cpp
     PRIVATE platform/qt/src/async_task_impl.hpp
-- 
cgit v1.2.1