1 #define JEMALLOC_BASE_C_ 2 #include "jemalloc/internal/jemalloc_internal.h" 3 4 /******************************************************************************/ 5 /* Data. */ 6 7 malloc_mutex_t base_mtx; 8 9 /* 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. 13 */ 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; 18 19 /******************************************************************************/ 20 /* Function prototypes for non-inline static functions. */ 21 22 static bool base_pages_alloc(size_t minsize); 23 24 /******************************************************************************/ 25 26 static bool 27 base_pages_alloc(size_t minsize) 28 { 29 size_t csize; 30 bool zero; 31 32 assert(minsize != 0); 33 csize = CHUNK_CEILING(minsize); 34 zero = false; 35 base_pages = chunk_alloc(csize, true, &zero); 36 if (base_pages == NULL) 37 return (true); 38 base_next_addr = base_pages; 39 base_past_addr = (void *)((uintptr_t)base_pages + csize); 40 41 return (false); 42 } 43 44 void * 45 base_alloc(size_t size) 46 { 47 void *ret; 48 size_t csize; 49 50 /* Round size up to nearest multiple of the cacheline size. */ 51 csize = CACHELINE_CEILING(size); 52 53 malloc_mutex_lock(&base_mtx); 54 /* Make sure there's enough space for the allocation. */ 55 if ((uintptr_t)base_next_addr + csize > (uintptr_t)base_past_addr) { 56 if (base_pages_alloc(csize)) { 57 malloc_mutex_unlock(&base_mtx); 58 return (NULL); 59 } 60 } 61 /* Allocate. */ 62 ret = base_next_addr; 63 base_next_addr = (void *)((uintptr_t)base_next_addr + csize); 64 malloc_mutex_unlock(&base_mtx); 65 66 return (ret); 67 } 68 69 extent_node_t * 70 base_node_alloc(void) 71 { 72 extent_node_t *ret; 73 74 malloc_mutex_lock(&base_mtx); 75 if (base_nodes != NULL) { 76 ret = base_nodes; 77 base_nodes = *(extent_node_t **)ret; 78 malloc_mutex_unlock(&base_mtx); 79 } else { 80 malloc_mutex_unlock(&base_mtx); 81 ret = (extent_node_t *)base_alloc(sizeof(extent_node_t)); 82 } 83 84 return (ret); 85 } 86 87 void 88 base_node_dealloc(extent_node_t *node) 89 { 90 91 malloc_mutex_lock(&base_mtx); 92 *(extent_node_t **)node = base_nodes; 93 base_nodes = node; 94 malloc_mutex_unlock(&base_mtx); 95 } 96 97 bool 98 base_boot(void) 99 { 100 101 base_nodes = NULL; 102 if (malloc_mutex_init(&base_mtx)) 103 return (true); 104 105 return (false); 106 } 107