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Mps example hwgc01.c: move from mps_alloc to ap: mps_reserve..mps_commit

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 Change: 159151
 ServerID: perforce.ravenbrook.com
This commit is contained in:
Richard Kistruck 2006-06-08 14:30:44 +01:00
parent 4dae854306
commit 61435c3209
1 changed files with 29 additions and 9 deletions
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38
mps/example/hw-gc/hwgc01.c
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@ -1,4 +1,4 @@
/* Simple C client of the MPS, with MV pool and VM arena */
/* Simple C client of the MPS, with ap in MV pool and VM arena */
/* $Id$ */
#include <stdlib.h> /* for malloc */
@ -54,6 +54,7 @@ int main(void)
size_t cbArena = 1 * 1024 * 1024 * 1024; /* 1GB, ie. one quarter of 32-bit address space */
mps_arena_t ArenaDemo = NULL;
mps_pool_t PoolDemo = NULL;
mps_ap_t ApDemo = NULL;
mps_res_t res;
@ -84,20 +85,38 @@ int main(void)
report("Created pool", ArenaDemo, PoolDemo);
}
{
/* Create ap */
res = mps_ap_create(&ApDemo, PoolDemo);
if (res != MPS_RES_OK) {
printf("mps_ap_create: failed with res %d.\n", res);
exit(2);
}
report("Created ap", ArenaDemo, PoolDemo);
}
{
/* Allocate memory */
size_t cbBuffer = 100;
size_t cbBuffer = 256;
void *p = NULL;
res = mps_alloc(&p, PoolDemo, cbBuffer);
if (res != MPS_RES_OK) {
printf("mps_alloc: failed with res %d.\n", res);
exit(2);
}
do {
res = mps_reserve(&p, ApDemo, cbBuffer);
if (res != MPS_RES_OK) {
printf("mps_reserve: failed with res %d.\n", res);
exit(2);
}
/* Initialise my object here -- ie. make it valid. */
/* (In this example, memory is manually managed, so even
uninitialized memory is already a 'valid object'. So
we can call commit immediately.) */
} while (! mps_commit(ApDemo, p, cbBuffer));
report("Allocated 100 bytes", ArenaDemo, PoolDemo);
report("Allocated 256 bytes", ArenaDemo, PoolDemo);
{
/* Show that it really is memory */
@ -113,7 +132,8 @@ int main(void)
printf(
"Success: The hello-world example code successfully allocated\n"
"some memory using mps_alloc(), in an MV pool, in a VM arena.\n"
"some memory using an allocation point with\n"
"mps_reserve()..mps_commit(), in an MV pool, in a VM arena.\n"
);
return 0;
}