Line data    Source code

       1              : /*
       2              :  *
       3              :  *    Copyright (c) 2020 Project CHIP Authors
       4              :  *    All rights reserved.
       5              :  *
       6              :  *    Licensed under the Apache License, Version 2.0 (the "License");
       7              :  *    you may not use this file except in compliance with the License.
       8              :  *    You may obtain a copy of the License at
       9              :  *
      10              :  *        http://www.apache.org/licenses/LICENSE-2.0
      11              :  *
      12              :  *    Unless required by applicable law or agreed to in writing, software
      13              :  *    distributed under the License is distributed on an "AS IS" BASIS,
      14              :  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
      15              :  *    See the License for the specific language governing permissions and
      16              :  *    limitations under the License.
      17              :  */
      18              : 
      19              : /**
      20              :  *    @file
      21              :  *      This file implements parts of the CHIP allocation API that are
      22              :  *      independent of the configured allocator.
      23              :  *
      24              :  */
      25              : 
      26              : #include <lib/core/CHIPConfig.h>
      27              : #include <lib/support/CHIPMem.h>
      28              : #include <lib/support/CHIPPlatformMemory.h>
      29              : 
      30              : #include <atomic>
      31              : #include <stdlib.h>
      32              : 
      33              : namespace chip {
      34              : namespace Platform {
      35              : 
      36              : extern CHIP_ERROR MemoryAllocatorInit(void * buf, size_t bufSize);
      37              : extern void MemoryAllocatorShutdown();
      38              : 
      39              : static std::atomic_int memoryInitializationCount{ 0 };
      40              : 
      41          504 : CHIP_ERROR MemoryInit(void * buf, size_t bufSize)
      42              : {
      43          504 :     if (memoryInitializationCount++ > 0)
      44              :     {
      45          381 :         return CHIP_NO_ERROR;
      46              :     }
      47              :     // Initialize the allocator.
      48          123 :     CHIP_ERROR err = MemoryAllocatorInit(buf, bufSize);
      49          123 :     if (err != CHIP_NO_ERROR)
      50              :     {
      51            0 :         return err;
      52              :     }
      53              :     // Here we do things like mbedtls_platform_set_calloc_free(), depending on configuration.
      54          123 :     return err;
      55              : }
      56              : 
      57          503 : void MemoryShutdown()
      58              : {
      59          503 :     if ((memoryInitializationCount > 0) && (--memoryInitializationCount == 0))
      60              :     {
      61              :         // Here we undo things like mbedtls_platform_set_calloc_free()
      62          122 :         MemoryAllocatorShutdown();
      63              :     }
      64          503 : }
      65              : 
      66              : } // namespace Platform
      67              : } // namespace chip