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Clarified the mutex code, renamed the NUM_TICK_TASKS macro

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@885 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Linus Nielsen Feltzing 2002-06-04 12:47:39 +00:00
parent 150c5a7cef
commit 80f8b22357
2 changed files with 11 additions and 11 deletions
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18
firmware/kernel.c
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@ -25,7 +25,7 @@
long current_tick = 0;
void (*tick_funcs[NUM_TICK_TASKS])(void);
void (*tick_funcs[MAX_NUM_TICK_TASKS])(void);
static void tick_start(unsigned int interval_in_ms);
@ -37,7 +37,7 @@ void kernel_init(void)
int i;
/* Clear the tick task array */
for(i = 0;i < NUM_TICK_TASKS;i++)
for(i = 0;i < MAX_NUM_TICK_TASKS;i++)
{
tick_funcs[i] = NULL;
}
@ -151,7 +151,7 @@ void IMIA0(void)
int i;
/* Run through the list of tick tasks */
for(i = 0;i < NUM_TICK_TASKS;i++)
for(i = 0;i < MAX_NUM_TICK_TASKS;i++)
{
if(tick_funcs[i])
{
@ -170,7 +170,7 @@ int tick_add_task(void (*f)(void))
int oldlevel = set_irq_level(15);
/* Add a task if there is room */
for(i = 0;i < NUM_TICK_TASKS;i++)
for(i = 0;i < MAX_NUM_TICK_TASKS;i++)
{
if(tick_funcs[i] == NULL)
{
@ -189,7 +189,7 @@ int tick_remove_task(void (*f)(void))
int oldlevel = set_irq_level(15);
/* Remove a task if it is there */
for(i = 0;i < NUM_TICK_TASKS;i++)
for(i = 0;i < MAX_NUM_TICK_TASKS;i++)
{
if(tick_funcs[i] == f)
{
@ -208,20 +208,20 @@ int tick_remove_task(void (*f)(void))
****************************************************************************/
void mutex_init(struct mutex *m)
{
m->count = 0;
m->locked = false;
}
void mutex_lock(struct mutex *m)
{
/* Wait until the lock is open... */
while(m->count)
while(m->locked)
yield();
/* ...and lock it */
m->count++;
m->locked = true;
}
void mutex_unlock(struct mutex *m)
{
m->count--;
m->locked = false;
}