static void ResumeAllThreads(SetupDesktop.ExtProgram item)
{
try
{
foreach (ProcessThread thread in item.Proc.Threads)
{
var pOpenThread = NativeMethods.OpenThread(NativeMethods.ThreadAccess.SUSPEND_RESUME, false, (uint)thread.Id);
if (pOpenThread == IntPtr.Zero)
{
break;
// continue;
}
/* https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-resumethread
* The ResumeThread function checks the suspend count of the subject thread. If the suspend count is zero, the thread is not currently suspended.
* Otherwise, the subject thread's suspend count is decremented. If the resulting value is zero, then the execution of the subject thread is resumed.
* If the return value is zero, the specified thread was not suspended. If the return value is 1, the specified thread was suspended but was restarted.
* If the return value is greater than 1, the specified thread is still suspended.
*/
do
{
item.SuspendCnt = (uint)NativeMethods.ResumeThread(pOpenThread);
} while (item.SuspendCnt > 0);
NativeMethods.CloseHandle(pOpenThread);
}
}
catch
{
//pgm unexpected ended etc, ignore; setupdesktop class will dispose it once ready.
}
}
static void SuspendAllThreads(SetupDesktop.ExtProgram item)
{
try
{
foreach (ProcessThread thread in item.Proc.Threads)
{
var pOpenThread = NativeMethods.OpenThread(NativeMethods.ThreadAccess.SUSPEND_RESUME, false, (uint)thread.Id);
if (pOpenThread == IntPtr.Zero)
{
break;
// continue;
}
/* https://docs.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-suspendthread
* Each thread has a suspend count (with a maximum value of MAXIMUM_SUSPEND_COUNT).
* If the suspend count is greater than zero, the thread is suspended; otherwise, the thread is not suspended and is eligible for execution.
* Calling SuspendThread causes the target thread's suspend count to be incremented.
* Attempting to increment past the maximum suspend count causes an error without incrementing the count.
*/
if (item.SuspendCnt == 0)
{
item.SuspendCnt = NativeMethods.SuspendThread(pOpenThread);
}
NativeMethods.CloseHandle(pOpenThread);
}
}
catch
{
//pgm unexpected ended etc, ignore; setupdesktop class will dispose it once ready.
}
}
