1 #define JEMALLOC_BASE_C_
2 #include "jemalloc/internal/jemalloc_internal.h"
4 /******************************************************************************/
7 static malloc_mutex_t base_mtx;
10 * Current pages that are being used for internal memory allocations. These
11 * pages are carved up in cacheline-size quanta, so that there is no chance of
12 * false cache line sharing.
14 static void *base_pages;
15 static void *base_next_addr;
16 static void *base_past_addr; /* Addr immediately past base_pages. */
17 static extent_node_t *base_nodes;
19 /******************************************************************************/
20 /* Function prototypes for non-inline static functions. */
22 static bool base_pages_alloc(size_t minsize);
24 /******************************************************************************/
27 base_pages_alloc(size_t minsize)
33 csize = CHUNK_CEILING(minsize);
35 base_pages = chunk_alloc(csize, chunksize, true, &zero,
36 chunk_dss_prec_get());
37 if (base_pages == NULL)
39 base_next_addr = base_pages;
40 base_past_addr = (void *)((uintptr_t)base_pages + csize);
46 base_alloc(size_t size)
51 /* Round size up to nearest multiple of the cacheline size. */
52 csize = CACHELINE_CEILING(size);
54 malloc_mutex_lock(&base_mtx);
55 /* Make sure there's enough space for the allocation. */
56 if ((uintptr_t)base_next_addr + csize > (uintptr_t)base_past_addr) {
57 if (base_pages_alloc(csize)) {
58 malloc_mutex_unlock(&base_mtx);
64 base_next_addr = (void *)((uintptr_t)base_next_addr + csize);
65 malloc_mutex_unlock(&base_mtx);
66 VALGRIND_MAKE_MEM_UNDEFINED(ret, csize);
72 base_calloc(size_t number, size_t size)
74 void *ret = base_alloc(number * size);
77 memset(ret, 0, number * size);
87 malloc_mutex_lock(&base_mtx);
88 if (base_nodes != NULL) {
90 base_nodes = *(extent_node_t **)ret;
91 malloc_mutex_unlock(&base_mtx);
92 VALGRIND_MAKE_MEM_UNDEFINED(ret, sizeof(extent_node_t));
94 malloc_mutex_unlock(&base_mtx);
95 ret = (extent_node_t *)base_alloc(sizeof(extent_node_t));
102 base_node_dealloc(extent_node_t *node)
105 VALGRIND_MAKE_MEM_UNDEFINED(node, sizeof(extent_node_t));
106 malloc_mutex_lock(&base_mtx);
107 *(extent_node_t **)node = base_nodes;
109 malloc_mutex_unlock(&base_mtx);
117 if (malloc_mutex_init(&base_mtx))
127 malloc_mutex_prefork(&base_mtx);
131 base_postfork_parent(void)
134 malloc_mutex_postfork_parent(&base_mtx);
138 base_postfork_child(void)
141 malloc_mutex_postfork_child(&base_mtx);