clear codes

src/platform/waiter_linux.h

@@ -2,18 +2,8 @@
 
 #include <pthread.h>
 
-#include <cstring>
-#include <atomic>
-#include <string>
-#include <utility>
-#include <tuple>
-
 #include "def.h"
 #include "log.h"
-#include "shm.h"
-#include "rw_lock.h"
-#include "id_pool.h"
-#include "pool_alloc.h"
 
 #include "platform/detail.h"
 
@@ -117,7 +107,7 @@ public:
 class semaphore {
     mutex         lock_;
     condition     cond_;
-    long      counter_ = 0;
+    long volatile counter_ = 0;
 
 public:
     bool open() {

src/platform/waiter_win.h

@@ -18,7 +18,8 @@ namespace ipc {
 namespace detail {
 
 class waiter {
-    std::atomic<long> counter_ { 0 };
+    long volatile counter_ = 0;
+    spin_lock     lock_;
 
 public:
     using handle_t = HANDLE;
@@ -37,51 +38,32 @@ public:
         ::CloseHandle(h);
     }
 
-    template <typename F>
-    static bool multi_wait_if(std::tuple<waiter*, handle_t> const * all, std::size_t size, F&& pred) {
-        if (all == nullptr || size == 0) {
-            return false;
-        }
-        if (!std::forward<F>(pred)()) return true;
-        auto hs = static_cast<handle_t*>(mem::alloc(sizeof(handle_t) * size));
-        IPC_UNUSED_ auto guard = unique_ptr(hs, [size](void* p) { mem::free(p, sizeof(handle_t) * size); });
-        std::size_t i = 0;
-        for (; i < size; ++i) {
-            auto& info = all[i];
-            if ((std::get<0>(all[i]) == nullptr) ||
-                (std::get<1>(all[i]) == invalid())) continue;
-            std::get<0>(info)->counter_.fetch_add(1, std::memory_order_relaxed);
-            hs[i] = std::get<1>(all[i]);
-        }
-        std::atomic_thread_fence(std::memory_order_release);
-        return ::WaitForMultipleObjects(static_cast<DWORD>(i), hs, FALSE, INFINITE) != WAIT_FAILED;
-    }
-
     template <typename F>
     bool wait_if(handle_t h, F&& pred) {
         if (h == invalid()) return false;
+        {
+            IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
             if (!std::forward<F>(pred)()) return true;
-        counter_.fetch_add(1, std::memory_order_relaxed);
+            ++ counter_;
-        std::atomic_thread_fence(std::memory_order_release);
+        }
         return ::WaitForSingleObject(h, INFINITE) == WAIT_OBJECT_0;
     }
 
     void notify(handle_t h) {
         if (h == invalid()) return;
-        for (unsigned k = 0;;) {
+        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
-            auto c = counter_.load(std::memory_order_acquire);
+        if (counter_ == 0) return;
-            if (c == 0) return;
+        -- counter_;
-            if (counter_.compare_exchange_weak(c, c - 1, std::memory_order_release)) {
-                break;
-            }
-            ipc::yield(k);
-        }
         ::ReleaseSemaphore(h, 1, NULL);
     }
 
     void broadcast(handle_t h) {
         if (h == invalid()) return;
-        ::ReleaseSemaphore(h, counter_.exchange(0, std::memory_order_acquire), NULL);
+        IPC_UNUSED_ auto guard = ipc::detail::unique_lock(lock_);
+        if (counter_ == 0) return;
+        long all_count = counter_;
+        counter_ = 0;
+        ::ReleaseSemaphore(h, all_count, NULL);
     }
 };
 

src/platform/waiter_wrapper.h

@@ -1,10 +1,7 @@
 #pragma once
 
-#include <string>
-#include <tuple>
 #include <type_traits>
-
+#include <atomic>
-#include "pool_alloc.h"
 
 #if defined(WIN64) || defined(_WIN64) || defined(__WIN64__) || \
     defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__NT__) || \
@@ -26,10 +23,6 @@ private:
     waiter_t* w_ = nullptr;
     waiter_t::handle_t h_ = waiter_t::invalid();
 
-    auto to_w_info() {
-        return std::make_tuple(w_, h_);
-    }
-
 public:
     waiter_wrapper() = default;
     explicit waiter_wrapper(waiter_t* w) {