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Add retry logic for OpenEvent to avoid problems when the

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process to kill hasn't yet created the event
This commit is contained in:
unknown 2008-03-10 12:54:46 +01:00
parent 79bd441fd8
commit 4aced3b84d
1 changed files with 24 additions and 4 deletions
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28
mysql-test/lib/My/SafeProcess/safe_kill_win.cc
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@ -29,6 +29,7 @@ int main(int argc, const char** argv )
DWORD pid= -1;
HANDLE shutdown_event;
char safe_process_name[32]= {0};
int retry_open_event= 100;
if (argc != 2) {
fprintf(stderr, "safe_kill <pid>\n");
@ -39,14 +40,33 @@ int main(int argc, const char** argv )
_snprintf(safe_process_name, sizeof(safe_process_name), "safe_process[%d]", pid);
/* Open the event to signal */
if ((shutdown_event=
OpenEvent(EVENT_MODIFY_STATE, FALSE, safe_process_name)) == NULL){
while ((shutdown_event=
OpenEvent(EVENT_MODIFY_STATE, FALSE, safe_process_name)) == NULL)
{
fprintf(stderr, "Failed to open shutdown_event '%s', error: %d\n",
safe_process_name, GetLastError());
exit(1);
/* Just check to see if pid exists */
HANDLE pid_handle= OpenProcess(SYNCHRONIZE, FALSE, pid);
if (pid_handle == NULL)
fprintf(stderr, "Could not open process with pid %d, error: %d\n", pid);
else
CloseHandle(pid_handle);
if (retry_open_event--)
{
fprintf(stderr, "retrying...\n");
Sleep(100); /* In milli seconds */
}
else
{
fprintf(stderr, "No more retries, exiting");
exit(1);
}
}
if(SetEvent(shutdown_event) == 0) {
if(SetEvent(shutdown_event) == 0)
{
fprintf(stderr, "Failed to signal shutdown_event '%s', error: %d\n",
safe_process_name, GetLastError());
CloseHandle(shutdown_event);