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Diffstat (limited to 'src/glut/dos/PC_HW/pc_timer.c')
-rw-r--r--src/glut/dos/PC_HW/pc_timer.c316
1 files changed, 158 insertions, 158 deletions
diff --git a/src/glut/dos/PC_HW/pc_timer.c b/src/glut/dos/PC_HW/pc_timer.c
index 36c02910a3..bf39bd0a4c 100644
--- a/src/glut/dos/PC_HW/pc_timer.c
+++ b/src/glut/dos/PC_HW/pc_timer.c
@@ -1,158 +1,158 @@
-/*
- * PC/HW routine collection v1.3 for DOS/DJGPP
- *
- * Copyright (C) 2002 - Borca Daniel
- * Email : dborca@yahoo.com
- * Web : http://www.geocities.com/dborca
- */
-
-
-#include <pc.h>
-
-#include "pc_hw.h"
-
-#define TIMER_IRQ 0
-
-#define MAX_TIMERS 8
-
-#define PIT_FREQ 0x1234DD
-
-#define unvolatile(__v, __t) __extension__ ({union { volatile __t __cp; __t __p; } __q; __q.__cp = __v; __q.__p;})
-
-static int timer_installed;
-
-typedef struct {
- volatile unsigned int counter, clock_ticks, freq;
- volatile PFUNC func;
- volatile void *parm;
-} TIMER;
-
-static TIMER timer_main, timer_func[MAX_TIMERS];
-
-static int timer ()
-{
- int i;
-
- for (i=0;i<MAX_TIMERS;i++) {
- TIMER *t = &timer_func[i];
- if (t->func) {
- t->clock_ticks += t->counter;
- if (t->clock_ticks>=timer_main.counter) {
- t->clock_ticks -= timer_main.counter;
- t->func(unvolatile(t->parm, void *));
- }
- }
- }
-
- timer_main.clock_ticks += timer_main.counter;
- if (timer_main.clock_ticks>=0x10000) {
- timer_main.clock_ticks -= 0x10000;
- return 1;
- } else {
- outportb(0x20, 0x20);
- return 0;
- }
-} ENDOFUNC(timer)
-
-void pc_remove_timer (void)
-{
- if (timer_installed) {
- timer_installed = FALSE;
- pc_clexit(pc_remove_timer);
-
- DISABLE();
- outportb(0x43, 0x34);
- outportb(0x40, 0);
- outportb(0x40, 0);
- ENABLE();
-
- pc_remove_irq(TIMER_IRQ);
- }
-}
-
-static int install_timer (void)
-{
- if (timer_installed||pc_install_irq(TIMER_IRQ, timer)) {
- return -1;
- } else {
- LOCKDATA(timer_func);
- LOCKDATA(timer_main);
- LOCKFUNC(timer);
-
- timer_main.counter = 0x10000;
-
- DISABLE();
- outportb(0x43, 0x34);
- outportb(0x40, 0);
- outportb(0x40, 0);
- timer_main.clock_ticks = 0;
- ENABLE();
-
- pc_atexit(pc_remove_timer);
- timer_installed = TRUE;
- return 0;
- }
-}
-
-static TIMER *find_slot (PFUNC func)
-{
- int i;
-
- for (i=0;i<MAX_TIMERS;i++) {
- if (timer_func[i].func==func) {
- return &timer_func[i];
- }
- }
- for (i=0;i<MAX_TIMERS;i++) {
- if (!timer_func[i].func) {
- return &timer_func[i];
- }
- }
-
- return NULL;
-}
-
-int pc_install_int (PFUNC func, void *parm, unsigned int freq)
-{
- int i;
- TIMER *t;
-
- if (!timer_installed) {
- if (install_timer()) {
- return -1;
- }
- }
-
- if ((t=find_slot(func))!=NULL) {
- unsigned int new_counter = PIT_FREQ / freq;
-
- DISABLE();
-
- t->func = func;
- t->parm = parm;
- t->freq = freq;
- t->clock_ticks = 0;
-
- if (new_counter < timer_main.counter) {
- for (i=0;i<MAX_TIMERS;i++) {
- if (timer_func[i].func) {
- timer_func[i].counter = new_counter * timer_func[i].freq / freq;
- }
- }
- outportb(0x43, 0x34);
- outportb(0x40, (unsigned char)new_counter);
- outportb(0x40, (unsigned char)(new_counter>>8));
- timer_main.clock_ticks = 0;
- timer_main.counter = new_counter;
- timer_main.freq = freq;
- } else {
- t->counter = PIT_FREQ * freq / (timer_main.freq * timer_main.freq);
- }
-
- ENABLE();
-
- return 0;
- }
-
- return -1;
-}
+/*
+ * PC/HW routine collection v1.3 for DOS/DJGPP
+ *
+ * Copyright (C) 2002 - Borca Daniel
+ * Email : dborca@yahoo.com
+ * Web : http://www.geocities.com/dborca
+ */
+
+
+#include <pc.h>
+
+#include "pc_hw.h"
+
+#define TIMER_IRQ 0
+
+#define MAX_TIMERS 8
+
+#define PIT_FREQ 0x1234DD
+
+#define unvolatile(__v, __t) __extension__ ({union { volatile __t __cp; __t __p; } __q; __q.__cp = __v; __q.__p;})
+
+static int timer_installed;
+
+typedef struct {
+ volatile unsigned int counter, clock_ticks, freq;
+ volatile PFUNC func;
+ volatile void *parm;
+} TIMER;
+
+static TIMER timer_main, timer_func[MAX_TIMERS];
+
+static int timer ()
+{
+ int i;
+
+ for (i=0;i<MAX_TIMERS;i++) {
+ TIMER *t = &timer_func[i];
+ if (t->func) {
+ t->clock_ticks += t->counter;
+ if (t->clock_ticks>=timer_main.counter) {
+ t->clock_ticks -= timer_main.counter;
+ t->func(unvolatile(t->parm, void *));
+ }
+ }
+ }
+
+ timer_main.clock_ticks += timer_main.counter;
+ if (timer_main.clock_ticks>=0x10000) {
+ timer_main.clock_ticks -= 0x10000;
+ return 1;
+ } else {
+ outportb(0x20, 0x20);
+ return 0;
+ }
+} ENDOFUNC(timer)
+
+void pc_remove_timer (void)
+{
+ if (timer_installed) {
+ timer_installed = FALSE;
+ pc_clexit(pc_remove_timer);
+
+ DISABLE();
+ outportb(0x43, 0x34);
+ outportb(0x40, 0);
+ outportb(0x40, 0);
+ ENABLE();
+
+ pc_remove_irq(TIMER_IRQ);
+ }
+}
+
+static int install_timer (void)
+{
+ if (timer_installed||pc_install_irq(TIMER_IRQ, timer)) {
+ return -1;
+ } else {
+ LOCKDATA(timer_func);
+ LOCKDATA(timer_main);
+ LOCKFUNC(timer);
+
+ timer_main.counter = 0x10000;
+
+ DISABLE();
+ outportb(0x43, 0x34);
+ outportb(0x40, 0);
+ outportb(0x40, 0);
+ timer_main.clock_ticks = 0;
+ ENABLE();
+
+ pc_atexit(pc_remove_timer);
+ timer_installed = TRUE;
+ return 0;
+ }
+}
+
+static TIMER *find_slot (PFUNC func)
+{
+ int i;
+
+ for (i=0;i<MAX_TIMERS;i++) {
+ if (timer_func[i].func==func) {
+ return &timer_func[i];
+ }
+ }
+ for (i=0;i<MAX_TIMERS;i++) {
+ if (!timer_func[i].func) {
+ return &timer_func[i];
+ }
+ }
+
+ return NULL;
+}
+
+int pc_install_int (PFUNC func, void *parm, unsigned int freq)
+{
+ int i;
+ TIMER *t;
+
+ if (!timer_installed) {
+ if (install_timer()) {
+ return -1;
+ }
+ }
+
+ if ((t=find_slot(func))!=NULL) {
+ unsigned int new_counter = PIT_FREQ / freq;
+
+ DISABLE();
+
+ t->func = func;
+ t->parm = parm;
+ t->freq = freq;
+ t->clock_ticks = 0;
+
+ if (new_counter < timer_main.counter) {
+ for (i=0;i<MAX_TIMERS;i++) {
+ if (timer_func[i].func) {
+ timer_func[i].counter = new_counter * timer_func[i].freq / freq;
+ }
+ }
+ outportb(0x43, 0x34);
+ outportb(0x40, (unsigned char)new_counter);
+ outportb(0x40, (unsigned char)(new_counter>>8));
+ timer_main.clock_ticks = 0;
+ timer_main.counter = new_counter;
+ timer_main.freq = freq;
+ } else {
+ t->counter = PIT_FREQ * freq / (timer_main.freq * timer_main.freq);
+ }
+
+ ENABLE();
+
+ return 0;
+ }
+
+ return -1;
+}
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