windows_process.c
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/* See COPYING.txt for the full license governing this code. */
/**
* \file windows_process.c
*
* Source file for the process API on windows.
*/
#include <SDL.h>
#include <SDL_test.h>
#include <string.h>
#include <stdlib.h>
#include "SDL_visualtest_process.h"
#if defined(__WIN32__)
void
LogLastError(char* str)
{
LPVOID buffer;
DWORD dw = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER|FORMAT_MESSAGE_FROM_SYSTEM|
FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dw,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPTSTR)&buffer,
0, NULL);
SDLTest_LogError("%s: %s", str, (char*)buffer);
LocalFree(buffer);
}
int
SDL_LaunchProcess(char* file, char* args, SDL_ProcessInfo* pinfo)
{
BOOL success;
char* working_directory;
char* command_line;
int path_length, args_length;
STARTUPINFO sui = {0};
sui.cb = sizeof(sui);
if(!file)
{
SDLTest_LogError("Path to executable to launched cannot be NULL.");
return 0;
}
if(!pinfo)
{
SDLTest_LogError("pinfo cannot be NULL.");
return 0;
}
/* get the working directory of the process being launched, so that
the process can load any resources it has in it's working directory */
path_length = SDL_strlen(file);
if(path_length == 0)
{
SDLTest_LogError("Length of the file parameter is zero.");
return 0;
}
working_directory = (char*)SDL_malloc(path_length + 1);
if(!working_directory)
{
SDLTest_LogError("Could not allocate working_directory - malloc() failed.");
return 0;
}
SDL_memcpy(working_directory, file, path_length + 1);
PathRemoveFileSpec(working_directory);
if(SDL_strlen(working_directory) == 0)
{
SDL_free(working_directory);
working_directory = NULL;
}
/* join the file path and the args string together */
if(!args)
args = "";
args_length = SDL_strlen(args);
command_line = (char*)SDL_malloc(path_length + args_length + 2);
if(!command_line)
{
SDLTest_LogError("Could not allocate command_line - malloc() failed.");
return 0;
}
SDL_memcpy(command_line, file, path_length);
command_line[path_length] = ' ';
SDL_memcpy(command_line + path_length + 1, args, args_length + 1);
/* create the process */
success = CreateProcess(NULL, command_line, NULL, NULL, FALSE,
NORMAL_PRIORITY_CLASS | CREATE_NO_WINDOW,
NULL, working_directory, &sui, &pinfo->pi);
if(working_directory)
{
SDL_free(working_directory);
working_directory = NULL;
}
SDL_free(command_line);
if(!success)
{
LogLastError("CreateProcess() failed");
return 0;
}
return 1;
}
int
SDL_GetProcessExitStatus(SDL_ProcessInfo* pinfo, SDL_ProcessExitStatus* ps)
{
DWORD exit_status;
BOOL success;
if(!pinfo)
{
SDLTest_LogError("pinfo cannot be NULL");
return 0;
}
if(!ps)
{
SDLTest_LogError("ps cannot be NULL");
return 0;
}
/* get the exit code */
success = GetExitCodeProcess(pinfo->pi.hProcess, &exit_status);
if(!success)
{
LogLastError("GetExitCodeProcess() failed");
return 0;
}
if(exit_status == STILL_ACTIVE)
ps->exit_status = -1;
else
ps->exit_status = exit_status;
ps->exit_success = 1;
return 1;
}
int
SDL_IsProcessRunning(SDL_ProcessInfo* pinfo)
{
DWORD exit_status;
BOOL success;
if(!pinfo)
{
SDLTest_LogError("pinfo cannot be NULL");
return -1;
}
success = GetExitCodeProcess(pinfo->pi.hProcess, &exit_status);
if(!success)
{
LogLastError("GetExitCodeProcess() failed");
return -1;
}
if(exit_status == STILL_ACTIVE)
return 1;
return 0;
}
static BOOL CALLBACK
CloseWindowCallback(HWND hwnd, LPARAM lparam)
{
DWORD pid;
SDL_ProcessInfo* pinfo;
pinfo = (SDL_ProcessInfo*)lparam;
GetWindowThreadProcessId(hwnd, &pid);
if(pid == pinfo->pi.dwProcessId)
{
DWORD result;
if(!SendMessageTimeout(hwnd, WM_CLOSE, 0, 0, SMTO_BLOCK,
1000, &result))
{
if(GetLastError() != ERROR_TIMEOUT)
{
LogLastError("SendMessageTimeout() failed");
return FALSE;
}
}
}
return TRUE;
}
int
SDL_QuitProcess(SDL_ProcessInfo* pinfo, SDL_ProcessExitStatus* ps)
{
DWORD wait_result;
if(!pinfo)
{
SDLTest_LogError("pinfo argument cannot be NULL");
return 0;
}
if(!ps)
{
SDLTest_LogError("ps argument cannot be NULL");
return 0;
}
/* enumerate through all the windows, trying to close each one */
if(!EnumWindows(CloseWindowCallback, (LPARAM)pinfo))
{
SDLTest_LogError("EnumWindows() failed");
return 0;
}
/* wait until the process terminates */
wait_result = WaitForSingleObject(pinfo->pi.hProcess, 1000);
if(wait_result == WAIT_FAILED)
{
LogLastError("WaitForSingleObject() failed");
return 0;
}
if(wait_result != WAIT_OBJECT_0)
{
SDLTest_LogError("Process did not quit.");
return 0;
}
/* get the exit code */
if(!SDL_GetProcessExitStatus(pinfo, ps))
{
SDLTest_LogError("SDL_GetProcessExitStatus() failed");
return 0;
}
return 1;
}
int
SDL_KillProcess(SDL_ProcessInfo* pinfo, SDL_ProcessExitStatus* ps)
{
BOOL success;
DWORD exit_status, wait_result;
if(!pinfo)
{
SDLTest_LogError("pinfo argument cannot be NULL");
return 0;
}
if(!ps)
{
SDLTest_LogError("ps argument cannot be NULL");
return 0;
}
/* initiate termination of the process */
success = TerminateProcess(pinfo->pi.hProcess, 0);
if(!success)
{
LogLastError("TerminateProcess() failed");
return 0;
}
/* wait until the process terminates */
wait_result = WaitForSingleObject(pinfo->pi.hProcess, INFINITE);
if(wait_result == WAIT_FAILED)
{
LogLastError("WaitForSingleObject() failed");
return 0;
}
/* get the exit code */
success = GetExitCodeProcess(pinfo->pi.hProcess, &exit_status);
if(!success)
{
LogLastError("GetExitCodeProcess() failed");
return 0;
}
ps->exit_status = exit_status;
ps->exit_success = 1;
return 1;
}
#endif