diff options
Diffstat (limited to '3rdparty/plibsys/src/ptimeprofiler-win.c')
| -rw-r--r-- | 3rdparty/plibsys/src/ptimeprofiler-win.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/3rdparty/plibsys/src/ptimeprofiler-win.c b/3rdparty/plibsys/src/ptimeprofiler-win.c new file mode 100644 index 0000000..22ee72f --- /dev/null +++ b/3rdparty/plibsys/src/ptimeprofiler-win.c @@ -0,0 +1,169 @@ +/* + * The MIT License + * + * Copyright (C) 2015-2017 Alexander Saprykin <saprykin.spb@gmail.com> + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files (the + * 'Software'), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sublicense, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY + * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/* https://msdn.microsoft.com/ru-ru/library/windows/desktop/dn553408(v=vs.85).aspx */ + +#include "ptimeprofiler.h" +#include "ptimeprofiler-private.h" + +#include <time.h> + +#if PLIBSYS_HAS_LLDIV +# include <stdlib.h> +#endif + +typedef puint64 (WINAPI * PWin32TicksFunc) (void); +typedef puint64 (* PWin32ElapsedFunc) (puint64 last_counter); + +static PWin32TicksFunc pp_time_profiler_ticks_func = NULL; +static PWin32ElapsedFunc pp_time_profiler_elapsed_func = NULL; +static puint64 pp_time_profiler_freq = 1; + +static puint64 WINAPI pp_time_profiler_get_hr_ticks (void); +static puint64 pp_time_profiler_elapsed_hr (puint64 last_counter); +static puint64 pp_time_profiler_elapsed_tick64 (puint64 last_counter); +static puint64 pp_time_profiler_elapsed_tick (puint64 last_counter); + +static puint64 WINAPI +pp_time_profiler_get_hr_ticks (void) +{ + LARGE_INTEGER tcounter; + + if (P_UNLIKELY (QueryPerformanceCounter (&tcounter) == FALSE)) { + P_ERROR ("PTimeProfiler::pp_time_profiler_get_hr_ticks: QueryPerformanceCounter() failed"); + tcounter.QuadPart = 0; + } + + return (puint64) tcounter.QuadPart; +} + +static puint64 +pp_time_profiler_elapsed_hr (puint64 last_counter) +{ + puint64 ticks; +#ifdef PLIBSYS_HAS_LLDIV + lldiv_t ldres; +#endif + puint64 quot; + puint64 rem; + + ticks = pp_time_profiler_ticks_func () - last_counter; + +#ifdef PLIBSYS_HAS_LLDIV + ldres = lldiv ((long long) ticks, (long long) pp_time_profiler_freq); + + quot = ldres.quot; + rem = ldres.rem; +#else + quot = ticks / pp_time_profiler_freq; + rem = ticks % pp_time_profiler_freq; +#endif + + return (puint64) (quot * 1000000 + (rem * 1000000) / pp_time_profiler_freq); +} + +static puint64 +pp_time_profiler_elapsed_tick64 (puint64 last_counter) +{ + return (pp_time_profiler_ticks_func () - last_counter) * 1000; +} + +static puint64 +pp_time_profiler_elapsed_tick (puint64 last_counter) +{ + puint64 val; + puint64 high_bit; + + high_bit = 0; + val = pp_time_profiler_ticks_func (); + + if (P_UNLIKELY (val < last_counter)) + high_bit = 1; + + return ((val | (high_bit << 32)) - last_counter) * 1000; +} + +puint64 +p_time_profiler_get_ticks_internal () +{ + return pp_time_profiler_ticks_func (); +} + +puint64 +p_time_profiler_elapsed_usecs_internal (const PTimeProfiler *profiler) +{ + return pp_time_profiler_elapsed_func (profiler->counter); +} + +void +p_time_profiler_init (void) +{ + LARGE_INTEGER tcounter; + HMODULE hmodule; + pboolean has_qpc; + + has_qpc = (QueryPerformanceCounter (&tcounter) != 0 && tcounter.QuadPart != 0) ? TRUE : FALSE; + + if (has_qpc == TRUE) { + if (P_UNLIKELY (QueryPerformanceFrequency (&tcounter) == 0)) { + P_ERROR ("PTimeProfiler::p_time_profiler_init: QueryPerformanceFrequency() failed"); + has_qpc = FALSE; + } else { + pp_time_profiler_freq = (puint64) (tcounter.QuadPart); + pp_time_profiler_ticks_func = (PWin32TicksFunc) pp_time_profiler_get_hr_ticks; + pp_time_profiler_elapsed_func = (PWin32ElapsedFunc) pp_time_profiler_elapsed_hr; + } + } + + if (P_UNLIKELY (has_qpc == FALSE)) { + hmodule = GetModuleHandleA ("kernel32.dll"); + + if (P_UNLIKELY (hmodule == NULL)) { + P_ERROR ("PTimeProfiler::p_time_profiler_init: failed to load kernel32.dll module"); + return; + } + + pp_time_profiler_ticks_func = (PWin32TicksFunc) GetProcAddress (hmodule, "GetTickCount64"); + pp_time_profiler_elapsed_func = (PWin32ElapsedFunc) pp_time_profiler_elapsed_tick64; + + if (P_UNLIKELY (pp_time_profiler_ticks_func == NULL)) { + pp_time_profiler_ticks_func = (PWin32TicksFunc) GetProcAddress (hmodule, "GetTickCount"); + pp_time_profiler_elapsed_func = (PWin32ElapsedFunc) pp_time_profiler_elapsed_tick; + } + + if (P_UNLIKELY (pp_time_profiler_ticks_func == NULL)) { + P_ERROR ("PTimeProfiler::p_time_profiler_init: no reliable tick counter"); + pp_time_profiler_elapsed_func = NULL; + } + } +} + +void +p_time_profiler_shutdown (void) +{ + pp_time_profiler_freq = 1; + pp_time_profiler_ticks_func = NULL; + pp_time_profiler_elapsed_func = NULL; +} |