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/*
TEST_HEADER
id = $Id$
summary = grey-box test of arena extension and compaction
language = c
link = testlib.o
parameters = CHUNKSIZE=1024*1024 ITERATIONS=100
END_HEADER
*/
#include "mpm.h"
#include "mpscmvff.h"
#include "testlib.h"
static void check_chunks(mps_arena_t arena, unsigned expected)
{
unsigned chunks = (unsigned)RingLength(ArenaChunkRing((Arena)arena));
asserts(chunks == expected, "expected %u chunks, got %u", expected, chunks);
}
static void test(void *stack_pointer)
{
mps_arena_t arena;
mps_pool_t pool;
mps_addr_t block[ITERATIONS];
unsigned i;
MPS_ARGS_BEGIN(args) {
MPS_ARGS_ADD(args, MPS_KEY_ARENA_SIZE, CHUNKSIZE);
die(mps_arena_create_k(&arena, mps_arena_class_vm(), args), "arena_create");
} MPS_ARGS_END(args);
MPS_ARGS_BEGIN(args) {
MPS_ARGS_ADD(args, MPS_KEY_SPARE, 0);
die(mps_pool_create_k(&pool, arena, mps_class_mvff(), args), "pool_create");
} MPS_ARGS_END(args);
check_chunks(arena, 1);
for (i = 0; i < ITERATIONS; ++i) {
die(mps_alloc(&block[i], pool, CHUNKSIZE), "mps_alloc");
check_chunks(arena, i + 2);
}
for (i = ITERATIONS; i > 0; --i) {
mps_free(pool, block[i - 1], CHUNKSIZE);
mps_arena_collect(arena); /* ensure ArenaCompact is called */
/* The first chunk to be freed from the pool to the arena gets
* some of its memory stolen for the spare memory land's block
* pool, and this prevents the chunk from being destroyed.
* Subsequent chunks can be freed in their entirety because the
* spare memory land has enough blocks. */
check_chunks(arena, i + 1);
}
mps_pool_destroy(pool);
mps_arena_destroy(arena);
}
int main(void)
{
run_test(test);
pass();
return 0;
}
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