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      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 #if !defined(__clang__) || __clang_major__ > 3 || (__clang_major__ == 3 && __clang_minor__ < 5)
     31 extern void* malloc(size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(1)));
     32 extern void* calloc(size_t item_count, size_t item_size) __mallocfunc __wur __attribute__((alloc_size(1,2)));
     33 extern void* realloc(void* p, size_t byte_count) __wur __attribute__((alloc_size(2)));
     34 extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur __attribute__((alloc_size(2)));
     35 #else
     36 extern void* malloc(size_t byte_count) __mallocfunc __wur;
     37 extern void* calloc(size_t item_count, size_t item_size) __mallocfunc __wur;
     38 extern void* realloc(void* p, size_t byte_count) __wur;
     39 extern void* memalign(size_t alignment, size_t byte_count) __mallocfunc __wur;
     40 #endif
     41 
     42 extern void free(void* p);
     43 extern size_t malloc_usable_size(const void* p);
     44 
     45 #ifndef STRUCT_MALLINFO_DECLARED
     46 #define STRUCT_MALLINFO_DECLARED 1
     47 struct mallinfo {
     48   size_t arena;    /* Total number of non-mmapped bytes currently allocated from OS. */
     49   size_t ordblks;  /* Number of free chunks. */
     50   size_t smblks;   /* (Unused.) */
     51   size_t hblks;    /* (Unused.) */
     52   size_t hblkhd;   /* Total number of bytes in mmapped regions. */
     53   size_t usmblks;  /* Maximum total allocated space; greater than total if trimming has occurred. */
     54   size_t fsmblks;  /* (Unused.) */
     55   size_t uordblks; /* Total allocated space (normal or mmapped.) */
     56   size_t fordblks; /* Total free space. */
     57   size_t keepcost; /* Upper bound on number of bytes releasable by malloc_trim. */
     58 };
     59 #endif  /* STRUCT_MALLINFO_DECLARED */
     60 
     61 extern struct mallinfo mallinfo(void);
     62 
     63 __END_DECLS
     64 
     65 #endif  /* LIBC_INCLUDE_MALLOC_H_ */
     66