1 /* 2 * Copyright (c) 2023 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 16 #ifndef JS_CONCURRENT_MODULE_COMMON_HELPER_CONCURRENT_HELPER_H 17 #define JS_CONCURRENT_MODULE_COMMON_HELPER_CONCURRENT_HELPER_H 18 19 #include <chrono> 20 #include <fstream> 21 #include <sstream> 22 #include <uv.h> 23 #if defined(OHOS_PLATFORM) 24 #include <unistd.h> 25 #elif defined(WINDOWS_PLATFORM) 26 #include <windows.h> 27 #elif defined(MAC_PLATFORM) || defined(IOS_PLATFORM) 28 #include <sys/sysctl.h> 29 #elif defined(ANDROID_PLATFORM) 30 #include <sys/sysinfo.h> 31 #endif 32 33 #if __GNUC__ 34 #define LIKELY(x) __builtin_expect(!!(x), 1) 35 #define UNLIKELY(x) __builtin_expect(!!(x), 0) 36 #else 37 #define LIKELY(x) (!!(x)) 38 #define UNLIKELY(x) (!!(x)) 39 #endif // __GNUC__ 40 41 namespace Commonlibrary::Concurrent::Common::Helper { 42 class ConcurrentHelper { 43 public: 44 using UvCallback = void(*)(const uv_async_t*); 45 46 ConcurrentHelper() = delete; 47 ~ConcurrentHelper() = delete; 48 49 enum class SystemMemoryLevel { 50 MEMORY_LEVEL_LOW, 51 MEMORY_LEVEL_MODERATE, 52 MEMORY_LEVEL_NORMAL 53 }; 54 GetMaxThreads()55 static uint32_t GetMaxThreads() 56 { 57 #if defined(OHOS_PLATFORM) 58 return sysconf(_SC_NPROCESSORS_ONLN) - 1; 59 #elif defined(WINDOWS_PLATFORM) 60 SYSTEM_INFO sysInfo; 61 GetSystemInfo(&sysInfo); 62 return sysInfo.dwNumberOfProcessors - 1; 63 #elif defined(MAC_PLATFORM) || defined(IOS_PLATFORM) 64 int32_t numCpu = 0; 65 size_t size = sizeof(numCpu); 66 sysctlbyname("hw.ncpu", &numCpu, &size, nullptr, 0); 67 return numCpu - 1; 68 #elif defined(ANDROID_PLATFORM) 69 return get_nprocs() - 1; 70 #else 71 return 1; // 1: default number 72 #endif 73 } 74 GetMilliseconds()75 static uint64_t GetMilliseconds() 76 { 77 auto now = std::chrono::system_clock::now(); 78 auto millisecs = std::chrono::duration_cast<std::chrono::milliseconds>(now.time_since_epoch()); 79 return millisecs.count(); 80 } 81 82 static void UvHandleInit(uv_loop_t* loop, uv_async_t*& handle, UvCallback func, void* data = nullptr) 83 { 84 handle = new uv_async_t; 85 handle->data = data; 86 uv_async_init(loop, handle, reinterpret_cast<uv_async_cb>(func)); 87 } 88 89 template<typename T> UvHandleClose(T * & handle)90 static void UvHandleClose(T*& handle) 91 { 92 if (handle == nullptr) { 93 return; 94 } 95 uv_close(reinterpret_cast<uv_handle_t*>(handle), [](uv_handle_t* handle) { 96 if (handle != nullptr) { 97 delete reinterpret_cast<T*>(handle); 98 handle = nullptr; 99 } 100 }); 101 handle = nullptr; 102 } 103 IsUvClosing(uv_async_t * handle)104 static bool IsUvClosing(uv_async_t* handle) 105 { 106 return uv_is_closing((uv_handle_t*)handle); 107 } 108 IsUvActive(uv_async_t * handle)109 static bool IsUvActive(uv_async_t* handle) 110 { 111 return handle != nullptr && !IsUvClosing(handle); 112 } 113 UvCheckAndAsyncSend(uv_async_t * handle)114 static void UvCheckAndAsyncSend(uv_async_t* handle) 115 { 116 if (LIKELY(IsUvActive(handle))) { 117 uv_async_send(handle); 118 } 119 } 120 121 #if defined(OHOS_PLATFORM) 122 static std::optional<double> GetSystemMemoryRatio(); 123 static SystemMemoryLevel GetMemoryLevel(); 124 static uint64_t ParseLine(const std::string& line); 125 #endif 126 static bool IsLowMemory(); 127 static bool IsModerateMemory(); 128 }; 129 } // namespace Commonlibrary::Concurrent::Common::Helper 130 #endif // JS_CONCURRENT_MODULE_COMMON_HELPER_CONCURRENT_HELPER_H