功能介绍

Vision SDK支持用户自己管理内存资源（DVPP与Device侧）。用户在调用涉及到内存资源相关的接口前，通过注册函数传入自定义的内存管理申请/释放函数，注册后用户可以通过自定义的接口从用户的内存资源池中申请/释放资源。该功能仅支持Atlas 推理系列产品。

注册函数必须成对使用，如果用户只注册了申请/释放函数其一，会使用默认方式，直接申请/释放内存。

相关接口说明请参考自定义内存资源池管理。

示例代码

以下分别为DVPP和Device侧注册函数的代码示例，不可以直接拷贝编译运行，仅供参考。

DVPP

APP_ERROR userCustomizedDVPPMallocFunc(unsigned int deviceID, void** buffer, unsigned long long size) {
     LogInfo << "user customized DVPP Malloc func called" ;
     // 此处添加用户自定义DVPP资源申请函数
     return APP_ERR_OK;
}

APP_ERROR userCustomizedDVPPFreeFunc(void* buffer) {
     LogInfo << "user customized DVPP Free func called" ;
     // 此处添加用户自定义DVPP资源释放函数
     return APP_ERR_OK;
 }
int main(){
     MxBase::MxInit();
    {  
     APP_ERROR ret = MxBase::DVPPMallocFuncHookReg(userCustomizedDVPPMallocFunc);
     if (ret != APP_ERR_OK) {
         std::cout << "registerTest failed, dvpp malloc registered failed" << std::endl;
     } else {
         std::cout << "registerTest success, dvpp malloc registered success" << std::endl;
     }

     ret = MxBase::DVPPFreeFuncHookReg(userCustomizedDVPPFreeFunc);
     if (ret != APP_ERR_OK) {
         std::cout << "registerTest failed, dvpp free registered failed" << std::endl;
     } else {
         std::cout << "registerTest success, dvpp free registered success" << std::endl;
     }
     }
     MxBase::MxDeInit();
 }

Device

APP_ERROR userCustomizedDeviceMallocFunc(void** buffer, unsigned int size, MxBase::MxMemMallocPolicy policy) {
     LogInfo << "user customized Device Malloc func called" ;
     // user customized Device Malloc function definition
     return APP_ERR_OK;
}

APP_ERROR userCustomizedDeviceFreeFunc(void* buffer) {
     LogInfo << "user customized Device Free func called" ;
     // user customized Device Free function definition
     return APP_ERR_OK;
 }
int main() {
     MxBase::MxInit();
     {
     APP_ERROR ret = MxBase::DeviceMallocFuncHookReg(userCustomizedDeviceMallocFunc);
     if (ret != APP_ERR_OK) {
         std::cout << "registerTest failed, device malloc registered failed" << std::endl;
     } else {
         std::cout << "registerTest success, device malloc registered success" << std::endl;
     }

     ret = MxBase::DeviceFreeFuncHookReg(userCustomizedDeviceFreeFunc);
     if (ret != APP_ERR_OK) {
         std::cout << "registerTest failed, device free registered failed" << std::endl;
     } else {
         std::cout << "registerTest success, device free registered success" << std::endl;
     }
     }
     MxBase::MxDeInit();
}