C6335
更新:2007 年 11 月
警告 C6335: 遺漏處理序資訊控制代碼 <handlename>
這則警告表示函式之 CreateProcess 系統所傳回的處理序資訊控制代碼,需要使用 CloseHandle 予以關閉。若無法這麼做,將會導致控制代碼遺漏。
範例
下列程式碼將產生出這個警告:
#include <windows.h>
#include <stdio.h>
void f( )
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory( &si, sizeof(si) );
si.cb = sizeof(si);
ZeroMemory( &pi, sizeof(pi) );
// Start the child process.
if( !CreateProcess( "C:\\WINDOWS\\system32\\calc.exe",
NULL,
NULL,
NULL,
FALSE,
0,
NULL,
NULL,
&si, // Pointer to STARTUPINFO structure.
&pi ) ) // Pointer to PROCESS_INFORMATION
{
puts("Error");
return;
}
// Wait until child process exits.
WaitForSingleObject( pi.hProcess, INFINITE );
CloseHandle( pi.hProcess );
}
若要更正這則警告,請依下列程式碼所示,呼叫 CloseHandle (pi.hThread) 以關閉執行緒控制代碼:
#include <windows.h>
#include <stdio.h>
void f( )
{
STARTUPINFO si;
PROCESS_INFORMATION pi;
ZeroMemory( &si, sizeof(si) );
si.cb = sizeof(si);
ZeroMemory( &pi, sizeof(pi) );
// Start the child process.
if( !CreateProcess( "C:\\WINDOWS\\system32\\calc.exe",
NULL,
NULL,
NULL,
FALSE,
0,
NULL,
NULL,
&si, // Pointer to STARTUPINFO structure.
&pi ) ) // Pointer to PROCESS_INFORMATION
{
puts("Error");
return;
}
// Wait until child process exits.
WaitForSingleObject( pi.hProcess, INFINITE );
CloseHandle( pi.hProcess );
CloseHandle( pi.hThread );
}