rename thread_local_ptr => tls::pointer

build/src.pro

@@ -22,7 +22,7 @@ HEADERS += \
     ../include/ipc.h \
     ../include/def.h \
     ../include/rw_lock.h \
-    ../include/thread_local_ptr.h
+    ../include/tls_pointer.h
 
 SOURCES += \
     ../src/shm.cpp \
@@ -31,7 +31,8 @@ SOURCES += \
 unix {
 
 SOURCES += \
-    ../src/platform/shm_linux.cpp
+    ../src/platform/shm_linux.cpp \
+    ../src/platform/tls_pointer_linux.cpp
 
 LIBS += -lrt
 
@@ -44,7 +45,7 @@ else:win32 {
 
 SOURCES += \
     ../src/platform/shm_win.cpp \
-    ../src/platform/thread_local_ptr_win.cpp
+    ../src/platform/tls_pointer_win.cpp
 
 LIBS += -lKernel32
 

include/thread_local_ptr.h

@@ -1,100 +0,0 @@
-#pragma once
-
-#include <utility>   // std::forward
-
-#if defined(WINCE) || defined(_WIN32_WCE) || \
-    defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
-    defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__)
-#include <windows.h> // DWORD, ::Tls...
-#define IPC_OS_WIN_
-#else
-#include <pthread.h> // pthread_...
-#endif
-
-namespace ipc {
-
-#if defined(IPC_OS_WIN_)
-
-#define IPC_THREAD_LOCAL_KEY_          DWORD
-#define IPC_THREAD_LOCAL_SET(KEY, PTR) (::TlsSetValue(KEY, (LPVOID)PTR) == TRUE)
-#define IPC_THREAD_LOCAL_GET(KEY)      (::TlsGetValue(KEY))
-
-void thread_local_create(IPC_THREAD_LOCAL_KEY_& key, void (*destructor)(void*));
-void thread_local_delete(IPC_THREAD_LOCAL_KEY_ key);
-
-#define IPC_THREAD_LOCAL_CREATE(KEY, DESTRUCTOR) thread_local_create(KEY, DESTRUCTOR)
-#define IPC_THREAD_LOCAL_DELETE(KEY)             thread_local_delete(KEY)
-
-#else /*!IPC_OS_WIN_*/
-
-#define IPC_THREAD_LOCAL_KEY_                    pthread_key_t
-#define IPC_THREAD_LOCAL_CREATE(KEY, DESTRUCTOR) pthread_key_create(&KEY, DESTRUCTOR)
-#define IPC_THREAD_LOCAL_DELETE(KEY)             pthread_key_delete(KEY)
-#define IPC_THREAD_LOCAL_SET(KEY, PTR)           (pthread_setspecific(KEY, (void*)PTR) == 0)
-#define IPC_THREAD_LOCAL_GET(KEY)                pthread_getspecific(KEY)
-
-#endif/*!IPC_OS_WIN_*/
-
-////////////////////////////////////////////////////////////////
-/// Thread-local pointer
-////////////////////////////////////////////////////////////////
-
-/*
-    <Remarks>
-
- 1. In Windows, if you do not compile thread_local_ptr.cpp,
-    use thread_local_ptr will cause memory leaks.
-
- 2. You need to set the thread_local_ptr's storage manually:
-    ```
-        thread_local_ptr<int> p;
-        if (!p) p = new int(123);
-    ```
-    Just like an ordinary pointer. Or you could just call create:
-    ```
-        thread_local_ptr<int> p;
-        p.create(123);
-    ```
-*/
-
-template <typename T>
-class thread_local_ptr {
-    IPC_THREAD_LOCAL_KEY_ key_;
-
-public:
-    using value_type = T;
-
-    thread_local_ptr() {
-        IPC_THREAD_LOCAL_CREATE(key_, [](void* p) {
-            delete static_cast<T*>(p);
-        });
-    }
-
-    ~thread_local_ptr() {
-        IPC_THREAD_LOCAL_DELETE(key_);
-    }
-
-    template <typename... P>
-    T* create(P&&... params) {
-        auto ptr = static_cast<T*>(*this);
-        if (ptr == nullptr) {
-            return (*this) = new T(std::forward<P>(params)...);
-        }
-        return ptr;
-    }
-
-    T* operator=(T* ptr) {
-        IPC_THREAD_LOCAL_SET(key_, ptr);
-        return ptr;
-    }
-
-    operator T*() const { return static_cast<T*>(IPC_THREAD_LOCAL_GET(key_)); }
-
-    T&       operator* ()       { return *static_cast<T*>(*this); }
-    const T& operator* () const { return *static_cast<T*>(*this); }
-
-    T*       operator->()       { return  static_cast<T*>(*this); }
-    const T* operator->() const { return  static_cast<T*>(*this); }
-};
-
-} // namespace ipc

include/tls_pointer.h

@@ -0,0 +1,84 @@
+#pragma once
+
+#include <cstdint>
+#include <utility>
+#include <limits>
+
+namespace ipc {
+namespace tls {
+
+using key_t        = std::uint64_t;
+using destructor_t = void (*)(void*);
+
+enum : key_t {
+    invalid_value = (std::numeric_limits<key_t>::max)()
+};
+
+key_t create (destructor_t destructor = nullptr);
+void  release(key_t key);
+
+bool  set(key_t key, void* ptr);
+void* get(key_t key);
+
+////////////////////////////////////////////////////////////////
+/// Thread-local pointer
+////////////////////////////////////////////////////////////////
+
+/*
+    <Remarks>
+
+ 1. In Windows, if you do not compile thread_local_ptr.cpp,
+    use thread_local_ptr will cause memory leaks.
+
+ 2. You need to set the thread_local_ptr's storage manually:
+    ```
+        thread_local_ptr<int> p;
+        if (!p) p = new int(123);
+    ```
+    Just like an ordinary pointer. Or you could just call create:
+    ```
+        thread_local_ptr<int> p;
+        p.create(123);
+    ```
+*/
+
+template <typename T>
+class pointer {
+    key_t key_;
+
+public:
+    using value_type = T;
+
+    pointer() {
+        key_ = tls::create([](void* p) { delete static_cast<T*>(p); });
+    }
+
+    ~pointer() {
+        tls::release(key_);
+    }
+
+    template <typename... P>
+    T* create(P&&... params) {
+        auto ptr = static_cast<T*>(*this);
+        if (ptr == nullptr) {
+            return (*this) = new T { std::forward<P>(params)... };
+        }
+        return ptr;
+    }
+
+    T* operator=(T* ptr) {
+        set(key_, ptr);
+        return ptr;
+    }
+
+    operator T*() const { return static_cast<T*>(get(key_)); }
+
+    T&       operator* ()       { return *static_cast<T*>(*this); }
+    const T& operator* () const { return *static_cast<T*>(*this); }
+
+    T*       operator->()       { return  static_cast<T*>(*this); }
+    const T* operator->() const { return  static_cast<T*>(*this); }
+};
+
+} // namespace tls
+} // namespace ipc

src/ipc.cpp

@@ -13,7 +13,7 @@
 #include "def.h"
 #include "circ_queue.h"
 #include "rw_lock.h"
-#include "thread_local_ptr.h"
+#include "tls_pointer.h"
 
 namespace {
 
@@ -36,7 +36,7 @@ using guard_t = std::unique_ptr<std::remove_pointer_t<handle_t>, void(*)(handle_
  *      https://sourceforge.net/p/mingw-w64/bugs/727/
 */
 /*thread_local*/
-thread_local_ptr<std::unordered_map<decltype(msg_t::id_), std::vector<byte_t>>> recv_caches__;
+tls::pointer<std::unordered_map<decltype(msg_t::id_), std::vector<byte_t>>> recv_caches__;
 
 std::unordered_map<handle_t, queue_t> h2q__;
 rw_lock h2q_lc__;

src/platform/tls_pointer_linux.cpp

@@ -0,0 +1,29 @@
+#include "tls_pointer.h"
+
+#include <pthread.h> // pthread_...
+
+namespace ipc {
+namespace tls {
+
+key_t create(destructor_t destructor) {
+    pthread_key_t k;
+    if (pthread_key_create(&k, destructor) == 0) {
+        return static_cast<key_t>(k);
+    }
+    return invalid_value;
+}
+
+void release(key_t key) {
+    pthread_key_delete(static_cast<pthread_key_t>(key));
+}
+
+bool set(key_t key, void* ptr) {
+    return pthread_setspecific(static_cast<pthread_key_t>(key), ptr) == 0;
+}
+
+void* get(key_t key) {
+    return pthread_getspecific(static_cast<pthread_key_t>(key));
+}
+
+} // namespace tls
+} // namespace ipc

src/platform/tls_pointer_win.cpp

@@ -1,4 +1,4 @@
-#include "thread_local_ptr.h"
+#include "tls_pointer.h"
 
 #include <windows.h>     // ::Tls...
 #include <unordered_map> // std::unordered_map
@@ -18,30 +18,31 @@ namespace ipc {
 */
 
 namespace {
-    struct tls_data {
+
+struct tls_data {
     using destructor_t = void(*)(void*);
-        using map_t = std::unordered_map<IPC_THREAD_LOCAL_KEY_, tls_data>;
+    using map_t = std::unordered_map<tls::key_t, tls_data>;
 
     static DWORD& key() {
-            static IPC_THREAD_LOCAL_KEY_ rec_key = ::TlsAlloc();
+        static DWORD rec_key = ::TlsAlloc();
         return rec_key;
     }
 
     static map_t* records(map_t* rec) {
-            IPC_THREAD_LOCAL_SET(key(), rec);
+        ::TlsSetValue(key(), static_cast<LPVOID>(rec));
         return rec;
     }
 
     static map_t* records() {
-            return static_cast<map_t*>(IPC_THREAD_LOCAL_GET(key()));
+        return static_cast<map_t*>(::TlsGetValue(key()));
     }
 
-        IPC_THREAD_LOCAL_KEY_ key_        = 0;
+    tls::key_t   key_        = tls::invalid_value;
     destructor_t destructor_ = nullptr;
 
     tls_data() = default;
 
-        tls_data(IPC_THREAD_LOCAL_KEY_ key, destructor_t destructor)
+    tls_data(tls::key_t key, destructor_t destructor)
         : key_       (key)
         , destructor_(destructor)
     {}
@@ -59,30 +60,43 @@ namespace {
     }
 
     ~tls_data() {
-            if (destructor_) destructor_(IPC_THREAD_LOCAL_GET(key_));
+        if (destructor_) destructor_(tls::get(key_));
     }
-    };
+};
-}
 
-void thread_local_create(IPC_THREAD_LOCAL_KEY_& key, void (*destructor)(void*)) {
+} // internal-linkage
-    key = ::TlsAlloc();
+
-    if (key == TLS_OUT_OF_INDEXES) return;
+namespace tls {
+
+key_t create(destructor_t destructor) {
+    key_t key = static_cast<key_t>(::TlsAlloc());
+    if (key == TLS_OUT_OF_INDEXES) return invalid_value;
     auto rec = tls_data::records();
     if (!rec) rec = tls_data::records(new tls_data::map_t);
-    if (!rec) return;
+    if (!rec) return key;
     rec->emplace(key, tls_data{ key, destructor });
+    return key;
 }
 
-void thread_local_delete(IPC_THREAD_LOCAL_KEY_ key) {
+void release(key_t key) {
     auto rec = tls_data::records();
     if (!rec) return;
     rec->erase(key);
-    ::TlsFree(key);
+    ::TlsFree(static_cast<DWORD>(key));
 }
 
-////////////////////////////////////////////////////////////////
+bool set(key_t key, void* ptr) {
-/// Call destructors on thread exit
+    return ::TlsSetValue(static_cast<DWORD>(key),
-////////////////////////////////////////////////////////////////
+                         static_cast<LPVOID>(ptr)) == TRUE;
+}
+
+void* get(key_t key) {
+    return static_cast<void*>(::TlsGetValue(static_cast<DWORD>(key)));
+}
+
+} // namespace tls
+
+namespace {
 
 void OnThreadExit() {
     auto rec = tls_data::records();
@@ -95,6 +109,12 @@ void NTAPI OnTlsCallback(PVOID, DWORD dwReason, PVOID) {
     if (dwReason == DLL_THREAD_DETACH) OnThreadExit();
 }
 
+} // internal-linkage
+
+////////////////////////////////////////////////////////////////
+/// Call destructors on thread exit
+////////////////////////////////////////////////////////////////
+
 #if defined(_MSC_VER)
 
 #if defined(IPC_OS_WIN64_)
@@ -102,8 +122,7 @@ void NTAPI OnTlsCallback(PVOID, DWORD dwReason, PVOID) {
 #pragma comment(linker, "/INCLUDE:_tls_used")
 #pragma comment(linker, "/INCLUDE:_tls_xl_b__")
 
-extern "C"
+extern "C" {
-{
 #   pragma const_seg(".CRT$XLB")
     extern const PIMAGE_TLS_CALLBACK _tls_xl_b__;
     const PIMAGE_TLS_CALLBACK _tls_xl_b__ = OnTlsCallback;
@@ -115,8 +134,7 @@ extern "C"
 #pragma comment(linker, "/INCLUDE:__tls_used")
 #pragma comment(linker, "/INCLUDE:__tls_xl_b__")
 
-extern "C"
+extern "C" {
-{
 #   pragma data_seg(".CRT$XLB")
     PIMAGE_TLS_CALLBACK _tls_xl_b__ = OnTlsCallback;
 #   pragma data_seg()
@@ -131,15 +149,13 @@ extern "C"
 #if defined(__MINGW64__) || (__MINGW64_VERSION_MAJOR) || \
     (__MINGW32_MAJOR_VERSION > 3) || ((__MINGW32_MAJOR_VERSION == 3) && (__MINGW32_MINOR_VERSION >= 18))
 
-extern "C"
+extern "C" {
-{
     IPC_CRTALLOC__(".CRT$XLB") PIMAGE_TLS_CALLBACK _tls_xl_b__ = OnTlsCallback;
 }
 
 #else /*!__MINGW*/
 
-extern "C"
+extern "C" {
-{
     ULONG _tls_index__ = 0;
 
     IPC_CRTALLOC__(".tls$AAA") char _tls_start__ = 0;
@@ -150,8 +166,7 @@ extern "C"
     IPC_CRTALLOC__(".CRT$XLZ") PIMAGE_TLS_CALLBACK _tls_xl_z__ = 0;
 }
 
-extern "C" NX_CRTALLOC_(".tls") const IMAGE_TLS_DIRECTORY _tls_used =
+extern "C" NX_CRTALLOC_(".tls") const IMAGE_TLS_DIRECTORY _tls_used = {
-{
     (ULONG_PTR)(&_tls_start__ + 1),
     (ULONG_PTR) &_tls_end__,
     (ULONG_PTR) &_tls_index__,