diff options
Diffstat (limited to 'mbbsd/alloc.c')
| -rw-r--r-- | mbbsd/alloc.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/mbbsd/alloc.c b/mbbsd/alloc.c index 06b84177..de676ce4 100644 --- a/mbbsd/alloc.c +++ b/mbbsd/alloc.c @@ -56,6 +56,9 @@ static void REGPARM(1) *do_mmap(size_t size) { static __alloc_t* __small_mem[8]; +static int smallalloc[8]; +static int smallalloc_max[8]; + #define __SMALL_NR(i) (MEM_BLOCK_SIZE/(i)) #define __MIN_SMALL_SIZE __SMALL_NR(256) /* 16 / 32 */ @@ -88,6 +91,17 @@ static void REGPARM(2) __small_free(void*_ptr,size_t _size) { ptr->next=__small_mem[idx]; __small_mem[idx]=ptr; + + smallalloc[idx]--; + + if (MEM_BLOCK_SIZE == PAGE_SIZE && + smallalloc[idx] == 0 && + smallalloc_max[idx] < __SMALL_NR(size)) { + __alloc_t* p = __small_mem[idx]; + __alloc_t* ph = p - (size_t)p%PAGE_SIZE; + munmap(ph, MEM_BLOCK_SIZE); + __small_mem[idx] = 0; + } } static void* REGPARM(1) __small_malloc(size_t _size) { @@ -119,6 +133,10 @@ static void* REGPARM(1) __small_malloc(size_t _size) { __small_mem[idx]=ptr->next; ptr->next=0; + smallalloc[idx]++; + if(smallalloc[idx] > smallalloc_max[idx]) + smallalloc_max[idx] = smallalloc[idx]; + return ptr; } |