C/c++-createthread related APIs

To use a mutex object:

#include <windows.h> #include <iostream> #define ThreadCount 6HANDLE Ghmutex;dword WINAPI runthreadfunction    (LPVOID lpparam); int main (void) {HANDLE athread[threadcount];    DWORD ThreadID;    Create a mutex with no owner Ghmutex = CreateMutex (null, FALSE, NULL);        if (Ghmutex = = NULL) {std::cout << "CreateMutex error:" << GetLastError () << Std::endl;    return 1;                     } for (int i = 0; i < ThreadCount; i++) {Athread[i] = CreateThread (NULL, 0, (lpthread_start_routine) runthreadfunction, NULL, 0        , &threadid);  if (athread[i] = = nullptr) {std::cout << CreateThread error: "<< GetLastError () <<            Std::endl;        return 1;    }}//wait until all threads are terminated waitformultipleobjects (ThreadCount, Athread, TRUE, INFINITE); for (int i = 0; i < ThreadcoUNT;    i++) CloseHandle (Athread[i]);    Closes all thread handles and frees memory CloseHandle (Ghmutex); return 0;}    DWORD WINAPI runthreadfunction (lpvoid lpparam) {unreferenced_parameter (Lpparam);    DWORD Dwwaitresult; for (int i = 0; i < 5; i++) {//Get exclusive rights Dwwaitresult = WaitForSingleObject (Ghmutex, Infin        ITE);  Switch (dwwaitresult) {case Wait_object_0:try {std::cout << i                << Thread << getcurrentthreadid () << "is run ..." << Std::endl; } catch (...) {if (! ReleaseMutex (Ghmutex))//release Mutex {std::cout << "ReleaseMutex error" &lt                    ;< Std::endl;            }} break;        The thread is in an indeterminate state case Wait_abandoned:return FALSE; }} return TRUE;

If you remove the mutex you can see the output is very confusing ... The reason is also that the output of std::cout is spliced. It would be nice to output with printf, but the output I could be confusing.

Such as:

Operation Result of Lock:

Here's an example of creating a thread that you see on MSDN, and if you want to pass other types of arguments without a type conversion warning, you can do this:

#include <windows.h> #include <tchar.h> #include <strsafe.h> #define Max_threads 3#define buf_size 255DWORD WINAPI mythreadfunction (lpvoid lpparam); void ErrorHandler (LPTSTR lpszfunction); typedef struct MYDATA {int V    Al1; int val2;}    MYDATA, *pmydata;int _tmain () {pmydata pdataarray[max_threads];    DWORD Dwthreadidarray[max_threads];    HANDLE Hthreadarray[max_threads]; for (int i=0; i<max_threads; i++) {Pdataarray[i] = (pmydata) HeapAlloc (GetProcessHeap (), Heap_zero_memory,        sizeof (MYDATA));        if (pdataarray[i] = = NULL) {exitprocess (2);        } pdataarray[i]->val1 = i;        Pdataarray[i]->val2 = i+100;            Hthreadarray[i] = CreateThread (NULL, 0, MyThreadFunction, Pdataarray[i],        0, &dwthreadidarray[i]);           if (hthreadarray[i] = = NULL) {ErrorHandler ((LPTSTR) TEXT ("CreateThread"));   ExitProcess (3);     }} waitformultipleobjects (Max_threads, Hthreadarray, TRUE, INFINITE);        for (int i=0; i<max_threads; i++) {CloseHandle (hthreadarray[i]);            if (pdataarray[i]! = NULL) {HeapFree (GetProcessHeap (), 0, pdataarray[i]);        Pdataarray[i] = NULL; }} return 0;}    DWORD WINAPI mythreadfunction (lpvoid lpparam) {HANDLE hstdout;    Pmydata Pdataarray;    TCHAR Msgbuf[buf_size];    size_t Cchstringsize;    DWORD Dwchars;    hStdOut = GetStdHandle (Std_output_handle);    if (hStdOut = = Invalid_handle_value) return 1;    Pdataarray = (pmydata) Lpparam;    stringcchprintf (Msgbuf, Buf_size, TEXT ("Parameters =%d,%d\n"), Pdataarray->val1, Pdataarray->val2);    Stringcchlength (Msgbuf, Buf_size, &cchstringsize);    Writeconsole (hStdOut, Msgbuf, (DWORD) cchstringsize, &dwchars, NULL); return 0;}    void ErrorHandler (LPTSTR lpszfunction) {lpvoid lpmsgbuf;    LPVOID Lpdisplaybuf;    DWORD DW = GetLastError (); FormAtmessage (Format_message_allocate_buffer |        Format_message_from_system | Format_message_ignore_inserts, NULL, DW, Makelangid (Lang_neutral, Sublang_default), (LPTSTR) &    Amp;lpmsgbuf, 0, NULL); Lpdisplaybuf = (LPVOID) LocalAlloc (Lmem_zeroinit, (Lstrlen (LPCTSTR) lpmsgbuf) + lstrlen ((LPCTSTR) lpszFunction) + +) * s    Izeof (TCHAR)); stringcchprintf ((LPTSTR) lpdisplaybuf, Localsize (lpdisplaybuf)/sizeof (TCHAR), TEXT ("%s failed with error%d:%s"),    Lpszfunction, DW, LPMSGBUF);    MessageBox (NULL, (LPCTSTR) lpdisplaybuf, TEXT ("Error"), MB_OK);    LocalFree (LPMSGBUF); LocalFree (LPDISPLAYBUF);}

The key part is the use of structural type.

C/c++-createthread related APIs