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-rw-r--r--src/common/timer.c250
1 files changed, 139 insertions, 111 deletions
diff --git a/src/common/timer.c b/src/common/timer.c
index 77d88d17d..34c95fcf6 100644
--- a/src/common/timer.c
+++ b/src/common/timer.c
@@ -31,66 +31,76 @@
#define TIMER_MIN_INTERVAL 50
+// timers
static struct TimerData* timer_data = NULL;
static int timer_data_max = 0;
static int timer_data_num = 0;
+// free timers
static int* free_timer_list = NULL;
static int free_timer_list_max = 0;
static int free_timer_list_pos = 0;
+//NOTE: using a binary heap should improve performance [FlavioJS]
+// timer heap (ordered array of tid's)
static int timer_heap_num = 0;
static int timer_heap_max = 0;
static int* timer_heap = NULL;
-
-static int fix_heap_flag =0; //Flag for fixing the stack only once per tick loop. May not be the best way, but it's all I can think of currently :X [Skotlex]
+// searches for the target tick's position and stores it in pos (binary search)
+#define HEAP_SEARCH(target,from,to,pos) \
+ do { \
+ int max,pivot; \
+ pos = from; \
+ max = to; \
+ while (pos < max) { \
+ pivot = (pos + max) / 2; \
+ if (DIFF_TICK(target, timer_data[timer_heap[pivot]].tick) < 0) \
+ pos = pivot + 1; \
+ else \
+ max = pivot; \
+ } \
+ } while(0)
// for debug
struct timer_func_list {
- int (*func)(int,unsigned int,int,int);
struct timer_func_list* next;
+ TimerFunc func;
char* name;
};
-static struct timer_func_list* tfl_root;
+static struct timer_func_list* tfl_root = NULL;
time_t start_time;
-#ifdef __WIN32
-/* Modified struct timezone to void - we pass NULL anyway */
-void gettimeofday (struct timeval *t, void *dummy)
-{
- DWORD millisec = GetTickCount();
-
- t->tv_sec = (int) (millisec / 1000);
- t->tv_usec = (millisec % 1000) * 1000;
-}
-#endif
-
-//
-int add_timer_func_list(int (*func)(int,unsigned int,int,int), char* name)
+/// Sets the name of a timer function.
+int add_timer_func_list(TimerFunc func, char* name)
{
struct timer_func_list* tfl;
if (name) {
- tfl = (struct timer_func_list*) aCalloc (sizeof(struct timer_func_list), 1);
- tfl->name = (char *) aMalloc (strlen(name) + 1);
-
+ for( tfl=tfl_root; tfl != NULL; tfl=tfl->next )
+ {// check suspicious cases
+ if( func == tfl->func )
+ ShowWarning("add_timer_func_list: duplicating function %08x(%s) as %s.\n",(int)tfl->func,tfl->name,name);
+ else if( strcmp(name,tfl->name) == 0 )
+ ShowWarning("add_timer_func_list: function %08X has the same name as %08X(%s)\n",(int)func,(int)tfl->func,tfl->name);
+ }
+ CREATE(tfl,struct timer_func_list,1);
tfl->next = tfl_root;
tfl->func = func;
- strcpy(tfl->name, name);
+ tfl->name = aStrdup(name);
tfl_root = tfl;
}
return 0;
}
-char* search_timer_func_list(int (*func)(int,unsigned int,int,int))
+/// Returns the name of the timer function.
+char* search_timer_func_list(TimerFunc func)
{
- struct timer_func_list* tfl = tfl_root;
- while (tfl) {
+ struct timer_func_list* tfl;
+
+ for( tfl=tfl_root; tfl != NULL; tfl=tfl->next )
if (func == tfl->func)
return tfl->name;
- tfl = tfl->next;
- }
return "unknown timer function";
}
@@ -103,18 +113,22 @@ static int gettick_count;
unsigned int gettick_nocache(void)
{
+#ifdef _WIN32
+ gettick_count = 256;
+ return gettick_cache = GetTickCount();
+#else
struct timeval tval;
gettimeofday(&tval, NULL);
gettick_count = 256;
return gettick_cache = tval.tv_sec * 1000 + tval.tv_usec / 1000;
+#endif
}
unsigned int gettick(void)
{
- gettick_count--;
- if (gettick_count < 0)
+ if (--gettick_count < 0)
return gettick_nocache();
return gettick_cache;
@@ -124,61 +138,56 @@ unsigned int gettick(void)
* CORE : Timer Heap
*--------------------------------------
*/
-static void push_timer_heap(int index)
+/// Adds a timer to the timer_heap
+static void push_timer_heap(int tid)
{
- int i, j;
- int min, max, pivot; // for sorting
+ unsigned int tick;
+ int pos;
+ int i;
// check number of element
if (timer_heap_num >= timer_heap_max) {
if (timer_heap_max == 0) {
timer_heap_max = 256;
- timer_heap = (int *) aCalloc( sizeof(int) , 256);
+ CREATE(timer_heap, int, 256);
} else {
timer_heap_max += 256;
- timer_heap = (int *) aRealloc( timer_heap, sizeof(int) * timer_heap_max);
+ RECREATE(timer_heap, int, timer_heap_max);
malloc_tsetdword(timer_heap + (timer_heap_max - 256), 0, sizeof(int) * 256);
}
}
// do a sorting from higher to lower
- j = timer_data[index].tick; // speed up
+ tick = timer_data[tid].tick; // speed up
// with less than 4 values, it's speeder to use simple loop
if (timer_heap_num < 4) {
for(i = timer_heap_num; i > 0; i--)
+ {
// if (j < timer_data[timer_heap[i - 1]].tick) //Plain comparisons break on bound looping timers. [Skotlex]
- if (DIFF_TICK(j, timer_data[timer_heap[i - 1]].tick) < 0)
+ if (DIFF_TICK(tick, timer_data[timer_heap[i - 1]].tick) < 0)
break;
else
timer_heap[i] = timer_heap[i - 1];
- timer_heap[i] = index;
- // searching by dichotomie
+ }
+ timer_heap[i] = tid;
+ // searching by dichotomy (binary search)
} else {
// if lower actual item is higher than new
// if (j < timer_data[timer_heap[timer_heap_num - 1]].tick) //Plain comparisons break on bound looping timers. [Skotlex]
- if (DIFF_TICK(j, timer_data[timer_heap[timer_heap_num - 1]].tick) < 0)
- timer_heap[timer_heap_num] = index;
+ if (DIFF_TICK(tick, timer_data[timer_heap[timer_heap_num - 1]].tick) < 0)
+ timer_heap[timer_heap_num] = tid;
else {
// searching position
- min = 0;
- max = timer_heap_num - 1;
- while (min < max) {
- pivot = (min + max) / 2;
-// if (j < timer_data[timer_heap[pivot]].tick) //Plain comparisons break on bound looping timers. [Skotlex]
- if (DIFF_TICK(j, timer_data[timer_heap[pivot]].tick) < 0)
- min = pivot + 1;
- else
- max = pivot;
- }
+ HEAP_SEARCH(tick,0,timer_heap_num-1,pos);
// move elements - do loop if there are a little number of elements to move
- if (timer_heap_num - min < 5) {
- for(i = timer_heap_num; i > min; i--)
+ if (timer_heap_num - pos < 5) {
+ for(i = timer_heap_num; i > pos; i--)
timer_heap[i] = timer_heap[i - 1];
// move elements - else use memmove (speeder for a lot of elements)
} else
- memmove(&timer_heap[min + 1], &timer_heap[min], sizeof(int) * (timer_heap_num - min));
+ memmove(&timer_heap[pos + 1], &timer_heap[pos], sizeof(int) * (timer_heap_num - pos));
// save new element
- timer_heap[min] = index;
+ timer_heap[pos] = tid;
}
}
@@ -190,34 +199,41 @@ static void push_timer_heap(int index)
*--------------------------
*/
-int acquire_timer (void)
+/// Returns a free timer id.
+static int acquire_timer(void)
{
- int i;
+ int tid;
if (free_timer_list_pos) {
do {
- i = free_timer_list[--free_timer_list_pos];
- } while(i >= timer_data_num && free_timer_list_pos > 0);
+ tid = free_timer_list[--free_timer_list_pos];
+ } while(tid >= timer_data_num && free_timer_list_pos > 0);
} else
- i = timer_data_num;
+ tid = timer_data_num;
- if (i >= timer_data_num)
- for (i = timer_data_num; i < timer_data_max && timer_data[i].type; i++);
- if (i >= timer_data_num && i >= timer_data_max) {
- if (timer_data_max == 0) {
+ if (tid >= timer_data_num)
+ for (tid = timer_data_num; tid < timer_data_max && timer_data[tid].type; tid++);
+ if (tid >= timer_data_num && tid >= timer_data_max)
+ {// expand timer array
+ if (timer_data_max == 0)
+ {// create timer data (1st time)
timer_data_max = 256;
- timer_data = (struct TimerData*) aCalloc( sizeof(struct TimerData) , timer_data_max);
- } else {
+ CREATE(timer_data, struct TimerData, timer_data_max);
+ } else
+ {// add more timers
timer_data_max += 256;
- timer_data = (struct TimerData *) aRealloc( timer_data, sizeof(struct TimerData) * timer_data_max);
+ RECREATE(timer_data, struct TimerData, timer_data_max);
malloc_tsetdword(timer_data + (timer_data_max - 256), 0, sizeof(struct TimerData) * 256);
}
}
- return i;
+ if (tid >= timer_data_num)
+ timer_data_num = tid + 1;
+
+ return tid;
}
-int add_timer(unsigned int tick,int (*func)(int,unsigned int,int,int), int id, int data)
+int add_timer(unsigned int tick,TimerFunc func, int id, int data)
{
int tid = acquire_timer();
@@ -229,13 +245,10 @@ int add_timer(unsigned int tick,int (*func)(int,unsigned int,int,int), int id, i
timer_data[tid].interval = 1000;
push_timer_heap(tid);
- if (tid >= timer_data_num)
- timer_data_num = tid + 1;
-
return tid;
}
-int add_timer_interval(unsigned int tick, int (*func)(int,unsigned int,int,int), int id, int data, int interval)
+int add_timer_interval(unsigned int tick, TimerFunc func, int id, int data, int interval)
{
int tid;
@@ -254,13 +267,10 @@ int add_timer_interval(unsigned int tick, int (*func)(int,unsigned int,int,int),
timer_data[tid].interval = interval;
push_timer_heap(tid);
- if (tid >= timer_data_num)
- timer_data_num = tid + 1;
-
return tid;
}
-int delete_timer(int id, int (*func)(int,unsigned int,int,int))
+int delete_timer(int id, TimerFunc func)
{
if (id <= 0 || id >= timer_data_num) {
ShowError("delete_timer error : no such timer %d (%08x(%s))\n", id, (int)func, search_timer_func_list(func));
@@ -281,41 +291,59 @@ int delete_timer(int id, int (*func)(int,unsigned int,int,int))
int addtick_timer(int tid, unsigned int tick)
{
- return timer_data[tid].tick += tick;
+ // Doesn't adjust the timer position. Might be the root of the FIXME in settick_timer. [FlavioJS]
+ //return timer_data[tid].tick += tick;
+ return settick_timer(tid, timer_data[tid].tick+tick);
}
//Sets the tick at which the timer triggers directly (meant as a replacement of delete_timer + add_timer) [Skotlex]
//FIXME: DON'T use this function yet, it is not correctly reorganizing the timer stack causing unexpected problems later on!
int settick_timer(int tid, unsigned int tick)
{
- int i,j;
- if (timer_data[tid].tick == tick)
+ int old_pos,pos;
+ unsigned int old_tick;
+
+ old_tick = timer_data[tid].tick;
+ if( old_tick == tick )
return tick;
//FIXME: This search is not all that effective... there doesn't seems to be a better way to locate an element in the heap.
- for(i = timer_heap_num-1; i >= 0 && timer_heap[i] != tid; i--);
-
- if (i < 0)
- return -1; //Sort of impossible, isn't it?
- if (DIFF_TICK(timer_data[tid].tick, tick) > 0)
- { //Timer is accelerated, shift timer near the end of the heap.
- if (i == timer_heap_num-1) //Nothing to shift.
- j = timer_heap_num-1;
+ //for(i = timer_heap_num-1; i >= 0 && timer_heap[i] != tid; i--);
+
+ // search old_tick position
+ HEAP_SEARCH(old_tick,0,timer_heap_num-1,old_pos);
+ while( timer_heap[old_pos] != tid )
+ {// skip timers with the same tick
+ if( DIFF_TICK(old_tick,timer_data[timer_heap[old_pos]].tick) != 0 )
+ {
+ ShowError("settick_timer: no such timer %d (%08x(%s))\n", tid, (int)timer_data[tid].func, search_timer_func_list(timer_data[tid].func));
+ return -1;
+ }
+ ++old_pos;
+ }
+
+ if( DIFF_TICK(tick,timer_data[tid].tick) < 0 )
+ {// Timer is accelerated, shift timer near the end of the heap.
+ if (old_pos == timer_heap_num-1) //Nothing to shift.
+ pos = old_pos;
else {
- for (j = i+1; j < timer_heap_num && DIFF_TICK(timer_data[j].tick, tick) > 0; j++);
- j--;
- memmove(&timer_heap[i], &timer_heap[i+1], (j-i)*sizeof(int));
+ HEAP_SEARCH(tick,old_pos+1,timer_heap_num-1,pos);
+ --pos;
+ if (pos != old_pos)
+ memmove(&timer_heap[old_pos], &timer_heap[old_pos+1], (pos-old_pos)*sizeof(int));
}
- } else { //Timer is delayed, shift timer near the beginning of the heap.
- if (i == 0) //Nothing to shift.
- j = 0;
+ } else
+ {// Timer is delayed, shift timer near the beginning of the heap.
+ if (old_pos == 0) //Nothing to shift.
+ pos = old_pos;
else {
- for (j = i-1; j >= 0 && DIFF_TICK(timer_data[j].tick, tick) < 0; j--);
- j++;
- memmove(&timer_heap[j+1], &timer_heap[j], (i-j)*sizeof(int));
+ HEAP_SEARCH(tick,0,old_pos-1,pos);
+ ++pos;
+ if (pos != old_pos)
+ memmove(&timer_heap[pos+1], &timer_heap[pos], (old_pos-pos)*sizeof(int));
}
}
- timer_heap[j] = tid;
+ timer_heap[pos] = tid;
timer_data[tid].tick = tick;
return tick;
}
@@ -341,15 +369,16 @@ static void fix_timer_heap(unsigned int tick)
}
//Move elements to readjust the heap.
tmp_heap = aCalloc(sizeof(int), i);
- memmove(&tmp_heap[0], &timer_heap[0], i*sizeof(int));
- memmove(&timer_heap[0], &timer_heap[i], (timer_heap_num-i)*sizeof(int));
- memmove(&timer_heap[timer_heap_num-i], &tmp_heap[0], i*sizeof(int));
+ memcpy(tmp_heap, timer_heap, i*sizeof(int));
+ memmove(timer_heap, &timer_heap[i], (timer_heap_num-i)*sizeof(int));
+ memmove(&timer_heap[timer_heap_num-i], tmp_heap, i*sizeof(int));
aFree(tmp_heap);
}
}
int do_timer(unsigned int tick)
{
+ static int fix_heap_flag = 0; //Flag for fixing the stack only once per tick loop. May not be the best way, but it's all I can think of currently :X [Skotlex]
int i, nextmin = 1000;
if (tick < 0x010000 && fix_heap_flag)
@@ -362,8 +391,8 @@ int do_timer(unsigned int tick)
i = timer_heap[timer_heap_num - 1]; // next shorter element
if ((nextmin = DIFF_TICK(timer_data[i].tick, tick)) > 0)
break;
- if (timer_heap_num > 0) // suppress the actual element from the table
- timer_heap_num--;
+
+ --timer_heap_num; // suppress the actual element from the table
timer_data[i].type |= TIMER_REMOVE_HEAP;
if (timer_data[i].func) {
if (nextmin < -1000) {
@@ -382,7 +411,7 @@ int do_timer(unsigned int tick)
timer_data[i].type = 0;
if (free_timer_list_pos >= free_timer_list_max) {
free_timer_list_max += 256;
- free_timer_list = (int *) aRealloc(free_timer_list, sizeof(int) * free_timer_list_max);
+ RECREATE(free_timer_list,int,free_timer_list_max);
malloc_tsetdword(free_timer_list + (free_timer_list_max - 256), 0, 256 * sizeof(int));
}
free_timer_list[free_timer_list_pos++] = i;
@@ -403,14 +432,14 @@ int do_timer(unsigned int tick)
if (nextmin < TIMER_MIN_INTERVAL)
nextmin = TIMER_MIN_INTERVAL;
- if ((unsigned int)(tick + nextmin) < tick) //Tick will loop, rearrange the heap on the next iteration.
+ if (UINT_MAX - nextmin < tick) //Tick will loop, rearrange the heap on the next iteration.
fix_heap_flag = 1;
return nextmin;
}
-unsigned long get_uptime (void)
+unsigned long get_uptime(void)
{
- return (unsigned long) difftime (time(NULL), start_time);
+ return (unsigned long)difftime(time(NULL), start_time);
}
void timer_init(void)
@@ -420,17 +449,16 @@ void timer_init(void)
void timer_final(void)
{
- struct timer_func_list* tfl = tfl_root, *tfl2;
+ struct timer_func_list *tfl;
+ struct timer_func_list *next;
- while (tfl) {
- tfl2 = tfl->next; // copy next pointer
+ for( tfl=tfl_root; tfl != NULL; tfl = next )
+ next = tfl->next; // copy next pointer
aFree(tfl->name); // free structures
aFree(tfl);
- tfl = tfl2; // use copied pointer for next cycle
}
-
+
if (timer_data) aFree(timer_data);
if (timer_heap) aFree(timer_heap);
if (free_timer_list) aFree(free_timer_list);
}
-