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30 * OS independent time-manipulation functions.
32 * @author Jose Fonseca <jfonseca@vmware.com>
36 #include "pipe/p_config.h"
38 #if defined(PIPE_OS_UNIX)
39 # include <sys/time.h> /* timeval */
40 #elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
43 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
45 extern VOID KeQuerySystemTime(PLARGE_INTEGER);
46 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
49 # error Unsupported OS
58 #if defined(PIPE_OS_UNIX)
61 gettimeofday(&tv, NULL);
62 return tv.tv_usec + tv.tv_sec*1000000LL;
64 #elif defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
66 static LONGLONG frequency;
69 EngQueryPerformanceFrequency(&frequency);
70 EngQueryPerformanceCounter(&counter);
71 return counter*INT64_C(1000000)/frequency;
73 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER) || defined(PIPE_SUBSYSTEM_WINDOWS_CE)
75 static LARGE_INTEGER frequency;
76 LARGE_INTEGER counter;
77 if(!frequency.QuadPart)
78 QueryPerformanceFrequency(&frequency);
79 QueryPerformanceCounter(&counter);
80 return counter.QuadPart*INT64_C(1000000)/frequency.QuadPart;
82 #elif defined(PIPE_SUBSYSTEM_WINDOWS_MINIPORT)
84 /* Updated every 10 miliseconds, measured in units of 100 nanoseconds.
85 * http://msdn.microsoft.com/en-us/library/ms801642.aspx */
86 LARGE_INTEGER counter;
87 KeQuerySystemTime(&counter);
88 return counter.QuadPart/10;
94 #if defined(PIPE_SUBSYSTEM_WINDOWS_DISPLAY)
97 os_time_sleep(int64_t usecs)
99 static LONGLONG frequency;
100 LONGLONG start, curr, end;
102 EngQueryPerformanceCounter(&start);
105 EngQueryPerformanceFrequency(&frequency);
107 end = start + (usecs * frequency + 999999LL)/1000000LL;
110 EngQueryPerformanceCounter(&curr);
111 } while(start <= curr && curr < end ||
112 end < start && (curr < end || start <= curr));
115 #elif defined(PIPE_SUBSYSTEM_WINDOWS_USER)
118 os_time_sleep(int64_t usecs)
120 Sleep((usecs + 999) / 1000);