issue #3996: impl gettid for macOS & cygwin64.

trunk/configure

@@ -464,7 +464,7 @@ if [[ $SRS_UTEST == YES ]]; then
     MODULE_FILES=("srs_utest" "srs_utest_amf0" "srs_utest_kernel" "srs_utest_core"
         "srs_utest_config" "srs_utest_rtmp" "srs_utest_http" "srs_utest_avc" "srs_utest_reload"
         "srs_utest_mp4" "srs_utest_service" "srs_utest_app" "srs_utest_rtc" "srs_utest_config2"
-        "srs_utest_protocol" "srs_utest_protocol2" "srs_utest_kernel2")
+        "srs_utest_protocol" "srs_utest_protocol2" "srs_utest_kernel2" "srs_utest_thread_pool")
     if [[ $SRS_SRT == YES ]]; then
         MODULE_FILES+=("srs_utest_srt")
     fi

trunk/src/app/srs_app_threads.cpp

@@ -36,9 +36,14 @@ using namespace std;
 #include <unistd.h>
 #include <fcntl.h>
 
-#if defined(SRS_OSX) || defined(SRS_CYGWIN64)
+#if defined(SRS_OSX)
     pid_t gettid() {
-        return 0;
+        uint64_t tid;
+        return pthread_threadid_np(NULL, &tid) ? 0 : tid;
+    }
+#elif defined(SRS_CYGWIN64)
+    pid_t gettid() {
+        return pthread_self();
     }
 #else
     #if __GLIBC__ == 2 && __GLIBC_MINOR__ < 30

trunk/src/utest/srs_utest_thread_pool.cpp

@@ -0,0 +1,29 @@
+//
+// Copyright (c) 2013-2024 The SRS Authors
+//
+// SPDX-License-Identifier: MIT
+//
+#include <srs_utest_thread_pool.hpp>
+#include <pthread.h>
+
+static srs_error_t dummy_loop(void*) {
+    return srs_success;
+}
+
+
+VOID TEST(ThreadPoolTest, tid) {
+    SrsThreadPool* thread_pool_1 = new SrsThreadPool();
+    SrsThreadPool* thread_pool_2 = new SrsThreadPool();
+
+    EXPECT_TRUE(thread_pool_1->execute("hybrid", dummy_loop, (void*)NULL) == srs_success);
+    EXPECT_TRUE(thread_pool_2->execute("hybrid", dummy_loop, (void*)NULL) == srs_success);
+    usleep(100);
+
+    EXPECT_GT(thread_pool_1->hybrid()->tid, 0);
+    EXPECT_GT(thread_pool_2->hybrid()->tid, 0);
+
+    EXPECT_NE(thread_pool_1->hybrid()->tid, thread_pool_2->hybrid()->tid);
+
+    srs_freep(thread_pool_1);
+    srs_freep(thread_pool_2);
+}

trunk/src/utest/srs_utest_thread_pool.hpp

@@ -0,0 +1,15 @@
+//
+// Copyright (c) 2013-2024 The SRS Authors
+//
+// SPDX-License-Identifier: MIT
+//
+
+#ifndef SRS_UTEST_THREAD_POOL
+#define SRS_UTEST_THREAD_POOL
+
+#include <srs_utest.hpp>
+
+#include <srs_app_threads.hpp>
+
+#endif // SRS_UTEST_THREAD_POOL
+