Critical sections in multi-threading

The critical section is also called the critical code segment. Shared variables are used to read and write securely when sharing variables in multiple threads. The code is as follows:

Critical_section??? G_cssync?=? {};//critical section int??? G_idata?=?0;dword?? WINAPI?? Writethreadproc (Lpvoid?lpparameter) {//write thread while? 1) {Sleep (+); __try{entercriticalsection (&g_cssync); g_idata++;} __finally{leavecriticalsection (&g_cssync);}} return?0;} DWORD? WINAPI?? Readthreadproc (Lpvoid?lpparameter) {//Read thread while? true) {Sleep (+); __try{entercriticalsection (&g_cssync);//Enter critical section char?str[20]?=?{}; Itoa (G_IDATA,?STR,?10); TRACE (str);} __finally{leavecriticalsection (&g_cssync);//Leave the critical area}}return?0;} void? Ctestthreaddlg::onbnclickedbutton16 () {initializecriticalsectionandspincount (&g_cssync,?0x4000);// Initialize critical section DWORD?? threadid?=?0; HANDLE?? Hthread[2]?=? {};hthread[0]?=? CreateThread (null,?0,? ( Lpthread_start_routine) Writethreadproc,?????????????????????? Null? Create_suspended,?&threadid); hthread[1]?=? CreateThread (null,?0,? ( Lpthread_start_routine) Readthreadproc,?????????????????????? Null? Create_suspended,?&threadid); ResumeThread (Hthread[0]); ResumeThread (hthread[1]); WaitForMultipleObjects (2,?hthread,? TRUE,? INFINITE); CloseHandle (Hthread[0]); CloseHandle (hthread[1]);D eletecriticalsection (&g_cssync);//delete critical section}

Critical sections in multi-threading