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thread_measure_stack_usage documentation

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fix documentation - the return value is the opposite of what it said
add and improve comments
renamed space to space_free (the name is documentation as well)
This commit is contained in:
Ludwig Ortmann 2014-01-20 10:42:59 +01:00
parent c42aa8993f
commit 81608bdab5
2 changed files with 5 additions and 4 deletions
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2
core/include/thread.h
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@ -96,7 +96,7 @@ int thread_getlastpid(void);
* Only works if the thread was created with the flag CREATE_STACKTEST.
*
* @param stack The stack you want to measure. try active_thread->stack_start.
* @return The current usage (overwritten addresses) of the thread's stack
* @return The amount of unused space of the thread's stack
*/
int thread_measure_stack_usage(char *stack);

7
core/thread.c
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@ -113,13 +113,14 @@ int thread_measure_stack_usage(char *stack)
{
unsigned int *stackp = (unsigned int *)stack;
/* assumption that the comparison fails before or after end of stack */
/* assume that the comparison fails before or after end of stack */
/* assume that the stack grows "downwards" */
while (*stackp == (unsigned int)stackp) {
stackp++;
}
int space = (unsigned int)stackp - (unsigned int)stack;
return space;
int space_free = (unsigned int)stackp - (unsigned int)stack;
return space_free;
}
int thread_create(char *stack, int stacksize, char priority, int flags, void (*function)(void), const char *name)