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#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>
#include "memblock.h"
unsigned n_blocks = 0;
struct memblock *memblock_new(size_t length) {
struct memblock *b = malloc(sizeof(struct memblock)+length);
b->type = MEMBLOCK_APPENDED;
b->ref = 1;
b->length = length;
b->data = b+1;
n_blocks++;
timerclear(&b->stamp);
return b;
}
struct memblock *memblock_new_fixed(void *d, size_t length) {
struct memblock *b = malloc(sizeof(struct memblock));
b->type = MEMBLOCK_FIXED;
b->ref = 1;
b->length = length;
b->data = d;
n_blocks++;
timerclear(&b->stamp);
return b;
}
struct memblock *memblock_new_dynamic(void *d, size_t length) {
struct memblock *b = malloc(sizeof(struct memblock));
b->type = MEMBLOCK_DYNAMIC;
b->ref = 1;
b->length = length;
b->data = d;
n_blocks++;
timerclear(&b->stamp);
return b;
}
struct memblock* memblock_ref(struct memblock*b) {
assert(b && b->ref >= 1);
b->ref++;
return b;
}
void memblock_unref(struct memblock*b) {
assert(b && b->ref >= 1);
b->ref--;
if (b->ref == 0) {
if (b->type == MEMBLOCK_DYNAMIC)
free(b->data);
free(b);
n_blocks--;
}
}
void memblock_unref_fixed(struct memblock *b) {
void *d;
assert(b && b->ref >= 1);
if (b->ref == 1) {
memblock_unref(b);
return;
}
d = malloc(b->length);
assert(d);
memcpy(d, b->data, b->length);
b->data = d;
b->type = MEMBLOCK_DYNAMIC;
}
void memblock_stamp(struct memblock*b) {
assert(b);
gettimeofday(&b->stamp, NULL);
}
uint32_t memblock_age(struct memblock*b) {
assert(b);
struct timeval tv;
uint32_t r;
if (b->stamp.tv_sec == 0)
return (suseconds_t) -1;
gettimeofday(&tv, NULL);
/*fprintf(stderr, "memblock: (%lu,%lu) -- (%lu,%lu)\r", b->stamp.tv_sec, b->stamp.tv_usec, tv.tv_sec, tv.tv_usec);*/
r = (tv.tv_sec-b->stamp.tv_sec) * 1000000;
if (tv.tv_usec >= b->stamp.tv_usec)
r += tv.tv_usec - b->stamp.tv_usec;
else
r -= b->stamp.tv_usec - tv.tv_usec;
return r;
}
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