Heap Memory
Format
#include <mallocinfo.h>
int _C_TS_malloc_info(struct _C_mallinfo_t *output_record, size_t sizeofoutput);Language Level: Extended
Threadsafe: Yes.
Description
The _C_TS_malloc_info() function determines the amount of teraspace memory used and returns the information within the given output_record structure.
Return Value
If successful, the function returns 0. If an error occurs, the function returns a negative value.
Example that uses _C_TS_malloc_info()
This example prints the information returned from _C_TS_malloc_info() to stdout . This program is compiled with TERASPACE(*YES *TSIFC).
#include <stdio.h>
#include <stdlib.h>
#include <mallocinfo.h>
int main (void)
{
_C_mallinfo_t info;
int rc;
void *m;
/* Allocate a small chunk of memory */
m = malloc(500);
rc = _C_TS_malloc_info(&info, sizeof(info));
if (rc == 0) {
printf("Total bytes = %llu\n",
info.total_bytes);
printf("Total allocated bytes = %llu\n",
info.allocated_bytes);
printf("Total unallocated bytes = %llu\n",
info.unallocated_bytes);
printf("Total allocated blocks = %llu\n",
info.allocated_blocks);
printf("Total unallocated blocks = %llu\n",
info.unallocated_blocks);
printf("Total requested bytes = %llu\n",
info.requested_bytes);
printf("Total pad bytes = %llu\n",
info.pad_bytes);
printf("Total overhead bytes = %llu\n",
info.overhead_bytes);
}
else {
printf("_C_TS_malloc_info failed (rc = %d)\n", rc);
}
free(m);
}
/****************************************************
The output should be similar to:
Total bytes = 524288
Total allocated bytes = 688
Total unallocated bytes = 523600
Total allocated blocks = 1
Total unallocated blocks = 1
Total requested bytes = 500
Total pad bytes = 12
Total overhead bytes = 176
****************************************************Related Information
Heap Memory