when to use g_assert and when to use g_return_*if_fail()

asserts.md

When to use g_assert* and when to use g_return* macros

Do use g_assert() when:

• The function is static inside your implementation
• If the precondition fails the entire module you have is in an inconsistent state

Do use g_return_{,val_}if_fail() when:

• For pre-conditions and post-conditions.
• You are in a public function.
• You are checking that the caller is using the API correctly.