Review | endproc.c: Implement ProcessPage_OnEndProcessTree
Akarsha Sehwag
akarsha15010 at iiitd.ac.in
Wed Apr 19 16:51:44 CDT 2017
Hi
Could someone take out a little time to review the code once?
Bug I intend to solve: https://bugs.winehq.org/show_bug.cgi?id=39640
I am new to wine. So, I would appreciate suggestions regarding my coding
style if that's not-so-perfect according to wine standards. Or any other
problems with the code I have written. I apologize for submitting an
untested code earlier. I hope now it works fine.
/*-------------------------------------------CODE--------------------------------------------------*/
typedef struct process_list {
DWORD *pid; /*dynamic array to store the process IDs*/
SIZE_T count; /*index to maintain the last entry of the
array;*/
SIZE_T size; /*the current size of the pid array*/
} process_list;
static void init_process_list(process_list *list) {
list->size = 4; /*initialise size with 4. Will increase if
necessary.*/
list->pid = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, list->size *
sizeof(list->pid));
list->count = 0;
}
static void increase_list_size(process_list *list) {
list->size *= 2;
list->pid = HeapReAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, list->pid,
list->size * sizeof(list->pid));
*//DOUBT: *Would sizeof(list->pid) be better or sizeof(int)?
//Since in the former case, since list->pid is actually a pointer to DWORD,
so //sizeof(list->pid) would return 8 bytes and not 4 bytes.
}
static void process_list_append(process_list *list, DWORD id) {
if(list->count == list->size)
increase_list_size(list);
list->pid[list->count] = id;
list->count += 1;
}
static void free_process_list(process_list *list) {
HeapFree(GetProcessHeap(), 0, list->pid);
}
static void enum_process_children(HANDLE snapshot, process_list *list,
DWORD pid) {
PROCESSENTRY32 entry;
SIZE_T start, end, i ;
start = list->count;
entry.dwSize = sizeof(entry);
if(!Process32First(snapshot, &entry))
return;
do
{
if(entry.th32ParentProcessID == pid)
process_list_append(list, entry.th32ProcessID);
} while (Process32Next(snapshot, &entry));
end = list->count;
for(i = start; i < end; ++i)
{
enum_process_children(snapshot, list, list->pid[i]);
}
}
void ProcessPage_OnEndProcessTree(void)
{
{...}
process_list list;
SIZE_T i;
HANDLE snapshot;
{...}
init_process_list(&list);
if(list.pid == NULL)
return;
process_list_append(&list, dwProcessId);
snapshot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0);
if(!snapshot)
return;
enum_process_children(snapshot, &list, dwProcessId);
CloseHandle(snapshot);
for(i = 0; i < list.count; ++i) {
hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, list.pid[i]);
if (!hProcess)
{
GetLastErrorText(wstrErrorText,
sizeof(wstrErrorText)/sizeof(WCHAR));
MessageBoxW(hMainWnd, wstrErrorText,wszUnable2Terminate,
MB_OK|MB_ICONSTOP);
break;
}
if (!TerminateProcess(hProcess, 0))
{
GetLastErrorText(wstrErrorText,
sizeof(wstrErrorText)/sizeof(WCHAR));
MessageBoxW(hMainWnd, wstrErrorText,wszUnable2Terminate,
MB_OK|MB_ICONSTOP);
}
CloseHandle(hProcess);
}
free_process_list(&list);
}
/*---------------------------------------END OF
CODE------------------------------------------*/
Thanks and regards
--
Akarsha Sehwag
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