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cpu/msp430_common: changes for heap command

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This commit is contained in:
Gunar Schorcht 2019-02-06 13:09:47 +01:00 committed by Schorcht
parent a63c0dda9c
commit a9db53e04a
2 changed files with 31 additions and 0 deletions
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5
cpu/msp430_common/include/cpu_conf.h
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@ -77,6 +77,11 @@ extern "C" {
#endif
/** @} */
/**
* @brief Declare the heap_stats function as available
*/
#define HAVE_HEAP_STATS
#ifdef __cplusplus
}
#endif

26
cpu/msp430_common/malloc.c
View File

@ -224,6 +224,10 @@ free(void *p)
state = irq_disable();
if (__brkval == NULL) {
__brkval = __malloc_heap_start;
}
/* ISO C says free(NULL) must be a no-op */
if (p == NULL) {
irq_restore(state);
@ -457,4 +461,26 @@ calloc(size_t nele, size_t size)
return p;
}
void heap_stats(void)
{
if (__brkval == NULL) {
__brkval = __malloc_heap_start;
}
long int heap_size = __malloc_heap_end - __malloc_heap_start;
long int free = __malloc_heap_end - __brkval;
struct __freelist *fp;
for (fp = __flp; fp; fp = fp->nx) {
free += fp->sz;
}
printf("heap: %ld (used %ld, free %ld) [bytes]\n",
heap_size, heap_size - free, free);
}
#else
void heap_stats(void) {
puts("heap statistics are not supported");
}
#endif /* MODULE_MSP430_MALLOC */