调整接口；添加 msg_que demo

demo/chat/main.cpp

@@ -1,6 +1,4 @@
 
-#include <signal.h>
-
 #include <iostream>
 #include <string>
 #include <thread>

demo/msg_que/CMakeLists.txt

@@ -1,5 +1,8 @@
 project(msg_que)
 
+include_directories(
+    ${CMAKE_SOURCE_DIR}/3rdparty)
+
 file(GLOB SRC_FILES ./*.cpp)
 file(GLOB HEAD_FILES ./*.h)
 

demo/msg_que/main.cpp

@@ -1,7 +1,15 @@
+
+#include <signal.h>
+
 #include <iostream>
 #include <string>
+#include <atomic>
+#include <thread>
+#include <chrono>
+#include <cstddef>
 
 #include "libipc/ipc.h"
+#include "capo/random.hpp"
 
 namespace {
 
@@ -9,11 +17,108 @@ constexpr char const name__[]   = "ipc-msg-que";
 constexpr char const mode_s__[] = "s";
 constexpr char const mode_r__[] = "r";
 
+constexpr std::size_t const min_sz = 128;
+constexpr std::size_t const max_sz = 1024 * 16;
+
+std::atomic<bool> is_quit__{ false };
+std::atomic<std::size_t> size_per_1s__{ 0 };
+
 using msg_que_t = ipc::chan<ipc::relat::single, ipc::relat::single, ipc::trans::unicast>;
 
+msg_que_t que__{ name__ };
+ipc::byte_t buff__[max_sz];
+capo::random<> rand__{ min_sz, max_sz };
+
+inline std::string str_of_size(std::size_t sz) noexcept {
+    if (sz <= 1024) {
+        return std::to_string(sz) + " bytes";
+    }
+    if (sz <= 1024 * 1024) {
+        return std::to_string(sz / 1024) + " KB";
+    }
+    return std::to_string(sz / (1024 * 1024)) + " MB";
+}
+
+inline std::string speed_of(std::size_t sz) noexcept {
+    return str_of_size(sz) + " /s";
+}
+
+void do_counting() {
+    for (int i = 1; !is_quit__.load(std::memory_order_acquire); ++i) {
+        std::this_thread::sleep_for(std::chrono::milliseconds(100)); // 100 ms
+        if (i % 10) continue;
+        i = 0;
+        std::cout
+            << speed_of(size_per_1s__.load(std::memory_order_acquire))
+            << std::endl;
+        size_per_1s__.store(0, std::memory_order_release);
+    }
+}
+
+void do_send() {
+    std::cout 
+        << __func__ << ": start [" 
+        << str_of_size(min_sz) << " - " << str_of_size(max_sz) 
+        << "]...\n";
+    if (!que__.reconnect(ipc::sender)) {
+        std::cerr << __func__ << ": connect failed.\n";
+    }
+    else {
+        std::thread counting{ do_counting };
+        while (!is_quit__.load(std::memory_order_acquire)) {
+            std::size_t sz = static_cast<std::size_t>(rand__());
+            if (!que__.send(ipc::buff_t(buff__, sz))) {
+                std::cerr << __func__ << ": send failed.\n";
+                std::cout << __func__ << ": waiting for receiver...\n";
+                if (!que__.wait_for_recv(1)) {
+                    std::cerr << __func__ << ": wait receiver failed.\n";
+                    is_quit__.store(true, std::memory_order_release);
+                    break;
+                }
+            }
+            size_per_1s__.fetch_add(sz, std::memory_order_release);
+            std::this_thread::yield();
+        }
+        counting.join();
+    }
+    std::cout << __func__ << ": quit...\n";
+}
+
+void do_recv() {
+    std::cout
+        << __func__ << ": start ["
+        << str_of_size(min_sz) << " - " << str_of_size(max_sz)
+        << "]...\n";
+    if (!que__.reconnect(ipc::receiver)) {
+        std::cerr << __func__ << ": connect failed.\n";
+    }
+    else {
+        std::thread counting{ do_counting };
+        while (!is_quit__.load(std::memory_order_acquire)) {
+            auto msg = que__.recv();
+            if (msg.empty()) break;
+            size_per_1s__.fetch_add(msg.size(), std::memory_order_release);
+        }
+        counting.join();
+    }
+    std::cout << __func__ << ": quit...\n";
+}
+
 } // namespace
 
 int main(int argc, char ** argv) {
     if (argc < 2) return 0;
+
+    ::signal(SIGINT, [](int) {
+        is_quit__.store(true, std::memory_order_release);
+        que__.disconnect();
+    });
+
+    if (std::string{ argv[1] } == mode_s__) {
+        do_send();
+    }
+    else if (std::string{ argv[1] } == mode_r__) {
+        do_recv();
+    }
     return 0;
 }

include/libipc/ipc.h

@@ -20,6 +20,7 @@ enum : unsigned {
 template <typename Flag>
 struct IPC_EXPORT chan_impl {
     static bool connect   (ipc::handle_t * ph, char const * name, unsigned mode);
+    static bool reconnect (ipc::handle_t * ph, unsigned mode);
     static void disconnect(ipc::handle_t h);
     static void destroy   (ipc::handle_t h);
 
@@ -90,8 +91,13 @@ public:
     bool connect(char const * name, unsigned mode = ipc::sender | ipc::receiver) {
         if (name == nullptr || name[0] == '\0') return false;
         this->disconnect();
-        detail_t::connect(&h_, name, mode_ = mode);
+        return detail_t::connect(&h_, name, mode_ = mode);
-        return valid();
+    }
+
+    bool reconnect(unsigned mode) {
+        if (!valid()) return false;
+        if (mode_ == mode) return true;
+        return detail_t::reconnect(&h_, mode_ = mode);
     }
 
     void disconnect() {

src/ipc.cpp

@@ -345,23 +345,6 @@ constexpr static queue_t* queue_of(ipc::handle_t h) {
 
 /* API implementations */
 
-static bool connect(ipc::handle_t * ph, char const * name, bool start) {
-    assert(ph != nullptr);
-    if (*ph == nullptr) {
-        *ph = ipc::mem::alloc<conn_info_t>(name);
-    }
-    auto que = queue_of(*ph);
-    if (que == nullptr) {
-        return false;
-    }
-    if (start) {
-        if (que->connect()) { // wouldn't connect twice
-            info_of(*ph)->cc_waiter_.broadcast();
-        }
-    }
-    return true;
-}
-
 static void disconnect(ipc::handle_t h) {
     auto que = queue_of(h);
     if (que == nullptr) {
@@ -374,6 +357,33 @@ static void disconnect(ipc::handle_t h) {
     }
 }
 
+static bool reconnect(ipc::handle_t * ph, bool start) {
+    assert(ph != nullptr);
+    assert(*ph != nullptr);
+    auto que = queue_of(*ph);
+    if (que == nullptr) {
+        return false;
+    }
+    if (start) {
+        if (que->connect()) { // wouldn't connect twice
+            info_of(*ph)->cc_waiter_.broadcast();
+        }
+    }
+    // start == false
+    else if (que->connected()) {
+        disconnect(*ph);
+    }
+    return true;
+}
+
+static bool connect(ipc::handle_t * ph, char const * name, bool start) {
+    assert(ph != nullptr);
+    if (*ph == nullptr) {
+        *ph = ipc::mem::alloc<conn_info_t>(name);
+    }
+    return reconnect(ph, start);
+}
+
 static void destroy(ipc::handle_t h) {
     disconnect(h);
     ipc::mem::free(info_of(h));
@@ -583,6 +593,11 @@ bool chan_impl<Flag>::connect(ipc::handle_t * ph, char const * name, unsigned mo
     return detail_impl<policy_t<Flag>>::connect(ph, name, mode & receiver);
 }
 
+template <typename Flag>
+bool chan_impl<Flag>::reconnect(ipc::handle_t * ph, unsigned mode) {
+    return detail_impl<policy_t<Flag>>::reconnect(ph, mode & receiver);
+}
+
 template <typename Flag>
 void chan_impl<Flag>::disconnect(ipc::handle_t h) {
     detail_impl<policy_t<Flag>>::disconnect(h);