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Summary
Macro
Decrements the reference count of a pointer by one. This macro also sets the pointer to NULL. NS_IF_RELEASE
has no effect when the pointer is NULL. This macro should only be used when the pointer might be NULL; otherwise, use NS_RELEASE.
NS_IF_RELEASE
is exactly equivalent to the following function:
inline void NS_IF_RELEASE(nsISupports* foo) { if (foo) foo->Release(); foo = 0; }
Syntax
NS_IF_RELEASE(foo);