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Added a METHOD() macro to define methods with both public and private signatures

This commit is contained in:
Martin Willi 2009-12-08 16:12:16 +01:00
parent 74eed73a40
commit 1a1ff9d127
1 changed files with 13 additions and 0 deletions
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13
src/libstrongswan/utils.h
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@ -114,6 +114,19 @@
#define INIT(this, ...) { (this) = malloc(sizeof(*this)); \
*(this) = (typeof(*this)){ __VA_ARGS__ }; }
/**
* Method declaration/definition macro, providing private and public interface.
*
* Defines a method name with this as first parameter and a return value ret,
* and an alias for this method with a _ prefix, having the this argument
* safely casted to the public interface iface.
* _name is provided a function pointer, but will get optimized out by GCC.
*/
#define METHOD(iface, name, ret, this, ...) \
static ret name(union {iface *_public; this;} __attribute__((transparent_union)), ##__VA_ARGS__); \
const static typeof(name) *_##name = (const typeof(name)*)name; \
static ret name(this, ##__VA_ARGS__)
/**
* Macro to allocate a sized type.
*/