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mruby-bigint: add pool state management for memory reuse

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This change introduces pool_save and pool_restore functions to allow
for the reuse of memory regions within the memory pool. The udiv
function is updated to use this mechanism, improving memory efficiency.

Co-authored-by: Gemini <gemini@google.com>
This commit is contained in:
Yukihiro "Matz" Matsumoto
2025-07-28 16:30:39 +09:00
parent 8825225e01
commit f904cb93cd
1 changed files with 16 additions and 0 deletions
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mrbgems/mruby-bigint/core/bigint.c
+16
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@@ -49,6 +49,20 @@ typedef struct mpz_context {
#define MPZ_HAS_POOL(ctx) ((ctx)->pool != NULL)
/* Pool allocation functions */
static size_t
pool_save(mpz_pool_t *pool)
{
return pool ? pool->used : 0;
}
static void
pool_restore(mpz_pool_t *pool, size_t state)
{
if (pool) {
pool->used = state;
}
}
static mp_limb*
pool_alloc(mpz_pool_t *pool, size_t limbs)
{
@@ -856,6 +870,7 @@ udiv(mpz_ctx_t *ctx, mpz_t *qq, mpz_t *rr, mpz_t *xx, mpz_t *yy)
mrb_assert(yy->sz > 0); /* divided by zero */
/* Use new context architecture with automatic pool/heap management */
size_t pool_state = pool_save(MPZ_POOL(ctx));
mpz_t q, x, y;
mpz_init_temp(ctx, &q, xx->sz - yy->sz + 1); /* Quotient size estimate */
mpz_init_temp(ctx, &x, xx->sz + 1); /* Dividend with potential carry */
@@ -966,6 +981,7 @@ udiv(mpz_ctx_t *ctx, mpz_t *qq, mpz_t *rr, mpz_t *xx, mpz_t *yy)
mpz_clear(ctx, &q);
mpz_clear(ctx, &x);
mpz_clear(ctx, &y);
pool_restore(MPZ_POOL(ctx), pool_state);
}
static void