


Things to note when allocating and destroying C++ function memory in embedded systems
Notes on memory allocation and destruction in embedded systems: Allocate memory carefully and use the new/delete operator. Dynamically allocated memory is released in the destructor when the function exits.
Notes on C function memory allocation and destruction in embedded systems
Memory allocation:
- Embedded systems Typically has limited memory, so care needs to be taken when allocating memory.
- Use the
new
operator to allocate memory, and then use thedelete
operator to free the memory.
Memory destruction:
- Ensure that memory is released when it is no longer needed to prevent memory leaks.
- When the function exits, dynamically allocated memory should be released in the destructor.
Practical case:
class MyClass { public: MyClass() { // 分配内存 data = new int[10]; } ~MyClass() { // 释放内存 delete[] data; } private: int* data; }; int main() { { // 函数作用域内创建对象 MyClass obj; } // obj 被销毁时,内存被释放 return 0; }
Note:
- Do not release memory when the function returns: This may result in undefined the behavior of.
- Don't leak memory: Unfreed memory will be wasted and may cause system instability.
- Consider using memory pools: Memory pools can improve memory reuse and reduce fragmentation.
- Use the RAII convention: The Resource Acquisition Is Initialization (RAII) convention ensures that resources are automatically released after the object's life cycle ends.
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