annotate src/timer/linux/SDL_systimer.c @ 316:d85fc19bf840

Added UNIX RDTSC code by Lompak (disabled by default)
author Sam Lantinga <slouken@libsdl.org>
date Sat, 23 Mar 2002 20:54:17 +0000
parents f6ffac90895c
children 4e8827521296
rev   line source
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
1 /*
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
2 SDL - Simple DirectMedia Layer
297
f6ffac90895c Updated copyright information for 2002
Sam Lantinga <slouken@libsdl.org>
parents: 252
diff changeset
3 Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
4
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
5 This library is free software; you can redistribute it and/or
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
6 modify it under the terms of the GNU Library General Public
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
7 License as published by the Free Software Foundation; either
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
8 version 2 of the License, or (at your option) any later version.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
9
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
10 This library is distributed in the hope that it will be useful,
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
13 Library General Public License for more details.
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
14
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
15 You should have received a copy of the GNU Library General Public
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
16 License along with this library; if not, write to the Free
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
18
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
19 Sam Lantinga
252
e8157fcb3114 Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents: 166
diff changeset
20 slouken@libsdl.org
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
21
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
22 RDTSC stuff by lompik (lompik@voila.fr) 20/03/2002
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
23 */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
24
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
25 #ifdef SAVE_RCSID
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
26 static char rcsid =
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
27 "@(#) $Id$";
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
28 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
29
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
30 #include <stdio.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
31 #include <sys/time.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
32 #include <signal.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
33 #include <unistd.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
34 #include <string.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
35 #include <errno.h>
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
36
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
37 #include "SDL_error.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
38 #include "SDL_timer.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
39 #include "SDL_timer_c.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
40
1
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
41 #if _POSIX_THREAD_SYSCALL_SOFT
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
42 #include <pthread.h>
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
43 #endif
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
44
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
45 #if defined(DISABLE_THREADS) || defined(FORK_HACK)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
46 #define USE_ITIMER
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
47 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
48
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
49 /* The following defines should really be determined at configure time */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
50
166
39877400bd1e Fixed Solaris nitpicks (thanks Mattias!)
Sam Lantinga <slouken@libsdl.org>
parents: 1
diff changeset
51 #if defined(linux)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
52 /* Linux select() changes its timeout parameter upon return to contain
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
53 the remaining time. Most other unixen leave it unchanged or undefined. */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
54 #define SELECT_SETS_REMAINING
166
39877400bd1e Fixed Solaris nitpicks (thanks Mattias!)
Sam Lantinga <slouken@libsdl.org>
parents: 1
diff changeset
55 #elif defined(__bsdi__) || defined(__FreeBSD__) || defined(__sun)
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
56 #define USE_NANOSLEEP
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
57 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
58
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
59 #if defined(i386) || defined(__i386__)
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
60 /* Actually, this isn't reliable on multi-cpu systems, so is disabled */
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
61 /*#define USE_RDTSC*/
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
62 #endif
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
63
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
64
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
65 #ifdef USE_RDTSC
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
66
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
67 /* The first ticks value of the application */
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
68 static unsigned long long start;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
69 static float cpu_mhz1000 = 0.0f;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
70
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
71 #if 1
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
72 /* This is for old binutils version that don't recognize rdtsc mnemonics.
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
73 But all binutils version supports this.
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
74 */
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
75 #define rdtsc(t) asm(".byte 0x0f, 0x31; " : "=A" (t));
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
76 #else
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
77 #define rdtsc(t) asm("rdtsc" : "=A" (t));
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
78 #endif
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
79
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
80 static float calc_cpu_mhz(void)
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
81 {
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
82 float cpu_mhz;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
83 unsigned long long tsc_start;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
84 unsigned long long tsc_end;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
85 struct timeval tv_start, tv_end;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
86 long usec_delay;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
87
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
88 rdtsc(tsc_start);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
89 gettimeofday(&tv_start, NULL);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
90 sleep(1);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
91 rdtsc(tsc_end);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
92 gettimeofday(&tv_end, NULL);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
93 usec_delay = 1000000L * (tv_end.tv_sec - tv_start.tv_sec) +
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
94 (tv_end.tv_usec - tv_start.tv_usec);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
95 cpu_mhz = (float)(tsc_end-tsc_start) / usec_delay;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
96 #if 0
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
97 printf("cpu MHz\t\t: %.3f\n", cpu_mhz);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
98 #endif
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
99 return cpu_mhz;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
100 }
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
101
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
102 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
103
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
104 /* The first ticks value of the application */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
105 static struct timeval start;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
106
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
107 #endif /* USE_RDTSC */
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
108
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
109
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
110 void SDL_StartTicks(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
111 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
112 /* Set first ticks value */
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
113 #ifdef USE_RDTSC
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
114 if ( ! cpu_mhz1000 ) {
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
115 cpu_mhz1000 = calc_cpu_mhz() * 1000.0f;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
116 }
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
117 rdtsc(start);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
118 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
119 gettimeofday(&start, NULL);
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
120 #endif /* USE_RDTSC */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
121 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
122
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
123 Uint32 SDL_GetTicks (void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
124 {
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
125 #ifdef USE_RDTSC
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
126 unsigned long long now;
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
127 if ( ! cpu_mhz1000 ) {
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
128 return 0; /* Shouldn't happen. BUG!! */
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
129 }
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
130 rdtsc(now);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
131 return (Uint32)((now-start)/cpu_mhz1000);
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
132 #else
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
133 struct timeval now;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
134 Uint32 ticks;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
135
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
136 gettimeofday(&now, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
137 ticks=(now.tv_sec-start.tv_sec)*1000+(now.tv_usec-start.tv_usec)/1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
138 return(ticks);
316
d85fc19bf840 Added UNIX RDTSC code by Lompak (disabled by default)
Sam Lantinga <slouken@libsdl.org>
parents: 297
diff changeset
139 #endif /* USE_RDTSC */
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
140 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
141
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
142 void SDL_Delay (Uint32 ms)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
143 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
144 int was_error;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
145
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
146 #ifdef USE_NANOSLEEP
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
147 struct timespec elapsed, tv;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
148 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
149 struct timeval tv;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
150 #ifndef SELECT_SETS_REMAINING
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
151 Uint32 then, now, elapsed;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
152 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
153 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
154
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
155 /* Set the timeout interval - Linux only needs to do this once */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
156 #ifdef SELECT_SETS_REMAINING
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
157 tv.tv_sec = ms/1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
158 tv.tv_usec = (ms%1000)*1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
159 #elif defined(USE_NANOSLEEP)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
160 elapsed.tv_sec = ms/1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
161 elapsed.tv_nsec = (ms%1000)*1000000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
162 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
163 then = SDL_GetTicks();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
164 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
165 do {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
166 errno = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
167
1
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
168 #if _POSIX_THREAD_SYSCALL_SOFT
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
169 pthread_yield_np();
cf2af46e9e2a Changes since SDL 1.2.0 release
Sam Lantinga <slouken@lokigames.com>
parents: 0
diff changeset
170 #endif
0
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
171 #ifdef USE_NANOSLEEP
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
172 tv.tv_sec = elapsed.tv_sec;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
173 tv.tv_nsec = elapsed.tv_nsec;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
174 was_error = nanosleep(&tv, &elapsed);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
175 #else
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
176 #ifndef SELECT_SETS_REMAINING
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
177 /* Calculate the time interval left (in case of interrupt) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
178 now = SDL_GetTicks();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
179 elapsed = (now-then);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
180 then = now;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
181 if ( elapsed >= ms ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
182 break;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
183 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
184 ms -= elapsed;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
185 tv.tv_sec = ms/1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
186 tv.tv_usec = (ms%1000)*1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
187 #endif
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
188 was_error = select(0, NULL, NULL, NULL, &tv);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
189 #endif /* USE_NANOSLEEP */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
190 } while ( was_error && (errno == EINTR) );
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
191 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
192
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
193 #ifdef USE_ITIMER
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
194
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
195 static void HandleAlarm(int sig)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
196 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
197 Uint32 ms;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
198
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
199 if ( SDL_alarm_callback ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
200 ms = (*SDL_alarm_callback)(SDL_alarm_interval);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
201 if ( ms != SDL_alarm_interval ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
202 SDL_SetTimer(ms, SDL_alarm_callback);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
203 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
204 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
205 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
206
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
207 int SDL_SYS_TimerInit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
208 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
209 struct sigaction action;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
210
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
211 /* Set the alarm handler (Linux specific) */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
212 memset(&action, 0, sizeof(action));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
213 action.sa_handler = HandleAlarm;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
214 action.sa_flags = SA_RESTART;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
215 sigemptyset(&action.sa_mask);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
216 sigaction(SIGALRM, &action, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
217 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
218 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
219
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
220 void SDL_SYS_TimerQuit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
221 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
222 SDL_SetTimer(0, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
223 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
224
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
225 int SDL_SYS_StartTimer(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
226 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
227 struct itimerval timer;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
228
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
229 timer.it_value.tv_sec = (SDL_alarm_interval/1000);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
230 timer.it_value.tv_usec = (SDL_alarm_interval%1000)*1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
231 timer.it_interval.tv_sec = (SDL_alarm_interval/1000);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
232 timer.it_interval.tv_usec = (SDL_alarm_interval%1000)*1000;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
233 setitimer(ITIMER_REAL, &timer, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
234 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
235 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
236
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
237 void SDL_SYS_StopTimer(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
238 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
239 struct itimerval timer;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
240
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
241 memset(&timer, 0, (sizeof timer));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
242 setitimer(ITIMER_REAL, &timer, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
243 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
244
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
245 #else /* USE_ITIMER */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
246
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
247 #include "SDL_thread.h"
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
248
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
249 /* Data to handle a single periodic alarm */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
250 static int timer_alive = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
251 static SDL_Thread *timer = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
252
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
253 static int RunTimer(void *unused)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
254 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
255 while ( timer_alive ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
256 if ( SDL_timer_running ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
257 SDL_ThreadedTimerCheck();
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
258 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
259 SDL_Delay(1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
260 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
261 return(0);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
262 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
263
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
264 /* This is only called if the event thread is not running */
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
265 int SDL_SYS_TimerInit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
266 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
267 timer_alive = 1;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
268 timer = SDL_CreateThread(RunTimer, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
269 if ( timer == NULL )
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
270 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
271 return(SDL_SetTimerThreaded(1));
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
272 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
273
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
274 void SDL_SYS_TimerQuit(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
275 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
276 timer_alive = 0;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
277 if ( timer ) {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
278 SDL_WaitThread(timer, NULL);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
279 timer = NULL;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
280 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
281 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
282
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
283 int SDL_SYS_StartTimer(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
284 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
285 SDL_SetError("Internal logic error: Linux uses threaded timer");
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
286 return(-1);
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
287 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
288
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
289 void SDL_SYS_StopTimer(void)
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
290 {
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
291 return;
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
292 }
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
293
74212992fb08 Initial revision
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
294 #endif /* USE_ITIMER */