Which Calling Convention is Responsible for Stack Cleanup?

Calling Conventions: stdcall vs. cdecl

In programming, calling conventions define how parameters are passed between functions. Two common calling conventions are stdcall and cdecl.

1. cdecl Function Calling

When a cdecl function is called, the caller is not responsible for cleaning up the stack. The compiler generates code to handle stack cleanup based on the function's calling convention.

2. Mixing Calling Conventions

Mixing calling conventions is generally not recommended. However, it is possible in some cases. For example, a stdcall function can call a cdecl function, or vice versa. This may happen in code that interacts with the Windows API, as WinAPI functions use the stdcall convention while C programs use cdecl by default.

3. Performance Comparison

There is no significant performance difference between stdcall and cdecl. Both conventions use the same amount of overhead in most cases. However, certain optimizations may be available depending on the specific compiler and platform.

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