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(get_process_times_fn): New function pointer.

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(globals_of_w32): Intialize it if present in kernel32.dll.
(w32_get_internal_run_time): New function.
This commit is contained in:
Jason Rumney 2007-06-14 15:58:13 +00:00
parent 553d316401
commit 7425851806
1 changed files with 54 additions and 0 deletions
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54
src/w32.c
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@ -137,6 +137,15 @@ typedef BOOL (WINAPI * GetTokenInformation_Proc) (
LPVOID TokenInformation,
DWORD TokenInformationLength,
PDWORD ReturnLength);
typedef BOOL (WINAPI * GetProcessTimes_Proc) (
HANDLE process_handle,
LPFILETIME creation_time,
LPFILETIME exit_time,
LPFILETIME kernel_time,
LPFILETIME user_time);
GetProcessTimes_Proc get_process_times_fn = NULL;
#ifdef _UNICODE
const char * const LookupAccountSid_Name = "LookupAccountSidW";
#else
@ -172,6 +181,46 @@ is_windows_9x ()
return s_b_ret;
}
/* Get total user and system times for get-internal-run-time.
Returns a list of three integers if the times are provided by the OS
(NT derivatives), otherwise it returns the result of current-time. */
Lisp_Object
w32_get_internal_run_time ()
{
if (get_process_times_fn)
{
FILETIME create, exit, kernel, user;
HANDLE proc = GetCurrentProcess();
if ((*get_process_times_fn) (proc, &create, &exit, &kernel, &user))
{
LARGE_INTEGER user_int, kernel_int, total;
int microseconds;
user_int.LowPart = user.dwLowDateTime;
user_int.HighPart = user.dwHighDateTime;
kernel_int.LowPart = kernel.dwLowDateTime;
kernel_int.HighPart = kernel.dwHighDateTime;
total.QuadPart = user_int.QuadPart + kernel_int.QuadPart;
/* FILETIME is 100 nanosecond increments, Emacs only wants
microsecond resolution. */
total.QuadPart /= 10;
microseconds = total.QuadPart % 1000000;
total.QuadPart /= 1000000;
/* Sanity check to make sure we can represent the result. */
if (total.HighPart == 0)
{
int secs = total.LowPart;
return list3 (make_number ((secs >> 16) & 0xffff),
make_number (secs & 0xffff),
make_number (microseconds));
}
}
}
return Fcurrent_time ();
}
/* ** The wrapper functions ** */
BOOL WINAPI open_process_token (
@ -4144,6 +4193,11 @@ BOOL WINAPI shutdown_handler(DWORD type)
void
globals_of_w32 ()
{
HMODULE kernel32 = GetModuleHandle ("kernel32.dll");
get_process_times_fn = (GetProcessTimes_Proc)
GetProcAddress (kernel32, "GetProcessTimes");
g_b_init_is_windows_9x = 0;
g_b_init_open_process_token = 0;
g_b_init_get_token_information = 0;