1 /* 2 * Copyright (C) 2012 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef LIBC_INCLUDE_MALLOC_H_ 18 #define LIBC_INCLUDE_MALLOC_H_ 19 20 /* 21 * Declaration of malloc routines. Bionic uses dlmalloc (see 22 * upstream-dlmalloc) but doesn't directly include it here to keep the 23 * defined malloc.h interface small. 24 */ 25 #include <sys/cdefs.h> 26 #include <stddef.h> 27 28 __BEGIN_DECLS 29 30 extern void* malloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1))); 31 extern void* calloc(size_t item_count, size_t item_size) __mallocfunc __wur __attribute__((alloc_size(1,2))); 32 extern void* realloc(void* p, size_t byte_count) __wur __attribute__((alloc_size(2))); 33 extern void free(void* p); 34 35 extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(2))); 36 extern size_t malloc_usable_size(const void* p); 37 38 #ifndef STRUCT_MALLINFO_DECLARED 39 #define STRUCT_MALLINFO_DECLARED 1 40 struct mallinfo { 41 size_t arena; /* Total number of non-mmapped bytes currently allocated from OS. */ 42 size_t ordblks; /* Number of free chunks. */ 43 size_t smblks; /* (Unused.) */ 44 size_t hblks; /* (Unused.) */ 45 size_t hblkhd; /* Total number of bytes in mmapped regions. */ 46 size_t usmblks; /* Maximum total allocated space; greater than total if trimming has occurred. */ 47 size_t fsmblks; /* (Unused.) */ 48 size_t uordblks; /* Total allocated space (normal or mmapped.) */ 49 size_t fordblks; /* Total free space. */ 50 size_t keepcost; /* Upper bound on number of bytes releasable by malloc_trim. */ 51 }; 52 #endif /* STRUCT_MALLINFO_DECLARED */ 53 54 extern struct mallinfo mallinfo(void); 55 56 __END_DECLS 57 58 #endif /* LIBC_INCLUDE_MALLOC_H_ */ 59