Windows與Linux下TLS實現

來源:互聯網
上載者:User

Under Windows:

#include <stdio.h><br />#include <windows.h><br />#include <process.h><br />// 利用TLS記錄線程的已耗用時間<br />DWORD g_tlsUsedTime;<br />void InitStartTime();<br />DWORD GetUsedTime();<br />UINT __stdcall ThreadFunc(LPVOID)<br />{<br /> int i;<br /> // 初始化開始時間<br /> InitStartTime();<br /> // 類比長時間工作<br /> i = 10000*10000;<br /> while(i--) { }<br /> // 列印出本線程啟動並執行時間<br /> printf(" This thread is coming to end. Thread ID: %-5d, Used Time: %d /n",<br /> ::GetCurrentThreadId(), GetUsedTime());<br /> return 0;<br />}<br />int main(int argc, char* argv[])<br />{<br /> UINT uId;<br /> int i;<br /> HANDLE h[10];<br /> // 通過在進程位元組中申請一個索引,初始化線程已耗用時間記錄系統<br /> g_tlsUsedTime = ::TlsAlloc();<br /> // 令十個線程同時運行,並等待它們各自的輸出結果<br /> for(i=0; i<10; i++)<br /> {<br /> h[i] = (HANDLE)::_beginthreadex(NULL, 0, ThreadFunc, NULL, 0, &uId);<br /> }<br /> for(i=0; i<10; i++)<br /> {<br /> ::WaitForSingleObject(h[i], INFINITE);<br /> ::CloseHandle(h[i]);<br /> }<br /> // 通過釋放線程局部儲存索引,釋放時間記錄系統佔用的資源<br /> ::TlsFree(g_tlsUsedTime);<br /> return 0;<br />}<br />// 初始化線程的開始時間<br />void InitStartTime()<br />{<br /> // 獲得目前時間,將線程的建立時間與線程對象相關聯<br /> DWORD dwStart = ::GetTickCount();<br /> ::TlsSetValue(g_tlsUsedTime, (LPVOID)dwStart);<br />}<br />// 取得一個線程已經啟動並執行時間<br />DWORD GetUsedTime()<br />{<br /> // 獲得目前時間,返回目前時間和線程建立時間的差值<br /> DWORD dwElapsed = ::GetTickCount();<br /> dwElapsed = dwElapsed - (DWORD)::TlsGetValue(g_tlsUsedTime);<br /> return dwElapsed;<br />}<br /> 

 

Under Linux:

#include <stdio.h><br />#include <pthread.h><br />#include <malloc.h><br />static pthread_key_t thread_log_key;<br />void write_to_thread_log( char const * message )<br />{<br /> FILE * thread_log = ( FILE * )pthread_getspecific( thread_log_key );<br /> fprintf( thread_log, "%s/n", message );<br />}<br />void close_thread_log( void * thread_log )<br />{<br /> fclose( ( FILE * )thread_log );<br />}<br />void * thread_function( void * args )<br />{<br /> char thread_log_filename[ 20 ];<br /> FILE* thread_log;<br /> sprintf( thread_log_filename, "thread%d.log", ( int )pthread_self() );<br /> thread_log = fopen( thread_log_filename, "w" );<br /> pthread_setspecific( thread_log_key, thread_log );<br /> write_to_thread_log( "Thread starting." );<br /> return NULL;<br />}<br />int main()<br />{<br /> int i;<br /> pthread_t threads[5];<br /> pthread_key_create( &thread_log_key, close_thread_log );<br /> for ( i = 0; i < 5; ++i )<br /> {<br /> pthread_create( &(threads[i]), NULL, thread_function, NULL );<br /> }<br /> for ( i = 0; i < 5; ++i )<br /> {<br /> pthread_join( threads[i], NULL );<br /> }<br /> return 0;<br />}<br />

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