Initial submission of the PCem-Experimental source code.

2016-06-26 00:34:39 +02:00
parent 09d7c4384f
commit fd2a5bc9f5
610 changed files with 184352 additions and 0 deletions
--- a/src/timer.c
+++ b/src/timer.c
@@ -0,0 +1,118 @@
+#include "ibm.h"
+
+/*#include "sound_opl.h"
+#include "adlibgold.h"
+#include "sound_pas16.h"
+#include "sound_sb.h"
+#include "sound_sb_dsp.h"
+#include "sound_wss.h"*/
+#include "timer.h"
+
+#define TIMERS_MAX 32
+
+int TIMER_USEC;
+
+static struct
+{
+	int present;
+	void (*callback)(void *priv);
+	void *priv;
+	int *enable;
+	int *count;
+} timers[TIMERS_MAX];
+
+int timers_present = 0;
+int timer_one = 1;
+	
+int timer_count = 0, timer_latch = 0;
+int timer_start = 0;
+
+void timer_process()
+{
+	int c;
+	int retry;
+	int process = 0;
+	/*Get actual elapsed time*/
+	int diff = timer_latch - timer_count;
+	int enable[TIMERS_MAX];
+
+	timer_latch = 0;
+
+        for (c = 0; c < timers_present; c++)
+        {
+                enable[c] = *timers[c].enable;
+                if (*timers[c].enable)
+                {
+                        *timers[c].count = *timers[c].count - diff;
+                        if (*timers[c].count <= 0)
+                                process = 1;
+                }
+        }
+        
+        if (!process)
+                return;
+
+        while (1)
+        {
+                int lowest = 1, lowest_c;
+                
+                for (c = 0; c < timers_present; c++)
+                {
+                        if (enable[c])
+                        {
+                                if (*timers[c].count < lowest)
+                                {
+                                        lowest = *timers[c].count;
+                                        lowest_c = c;
+                                }
+                        }
+                }
+                
+                if (lowest > 0)
+                        break;
+
+                timers[lowest_c].callback(timers[lowest_c].priv);
+                enable[lowest_c] = *timers[lowest_c].enable;
+        }              
+}
+
+void timer_update_outstanding()
+{
+	int c;
+	timer_latch = 0x7fffffff;
+	for (c = 0; c < timers_present; c++)
+	{
+		if (*timers[c].enable && *timers[c].count < timer_latch)
+			timer_latch = *timers[c].count;
+	}
+	timer_count = timer_latch = (timer_latch + ((1 << TIMER_SHIFT) - 1)) >> TIMER_SHIFT;
+}
+
+void timer_reset()
+{
+	pclog("timer_reset\n");
+	timers_present = 0;
+	timer_latch = timer_count = 0;
+//	timer_process();
+}
+
+int timer_add(void (*callback)(void *priv), int *count, int *enable, void *priv)
+{
+	if (timers_present < TIMERS_MAX)
+	{
+//		pclog("timer_add : adding timer %i\n", timers_present);
+		timers[timers_present].present = 1;
+		timers[timers_present].callback = callback;
+		timers[timers_present].priv = priv;
+		timers[timers_present].count = count;
+		timers[timers_present].enable = enable;
+		timers_present++;
+		return timers_present - 1;
+	}
+	return -1;
+}
+
+void timer_set_callback(int timer, void (*callback)(void *priv))
+{
+	timers[timer].callback = callback;
+}