/* SPDX-License-Identifier: GPL-2.0 */
/*
* An API to allow a function , that may fail , to be executed , and recover in a
* controlled manner .
*
* Copyright ( C ) 2019 , Google LLC .
* Author : Brendan Higgins < brendanhiggins @ google . com >
*/
#ifndef _KUNIT_TRY_CATCH_H
#define _KUNIT_TRY_CATCH_H
#include <linux/types.h>
typedef void (*kunit_try_catch_func_t)(void *);
struct kunit;
/**
* struct kunit_try_catch - provides a generic way to run code which might fail .
* @ test : The test case that is currently being executed .
* @ try_result : Contains any errno obtained while running test case .
* @ try : The function , the test case , to attempt to run .
* @ catch : The function called if @ try bails out .
* @ context : used to pass user data to the try and catch functions .
*
* kunit_try_catch provides a generic , architecture independent way to execute
* an arbitrary function of type kunit_try_catch_func_t which may bail out by
* calling kunit_try_catch_throw ( ) . If kunit_try_catch_throw ( ) is called , @ try
* is stopped at the site of invocation and @ catch is called .
*
* struct kunit_try_catch provides a generic interface for the functionality
* needed to implement kunit - > abort ( ) which in turn is needed for implementing
* assertions . Assertions allow stating a precondition for a test simplifying
* how test cases are written and presented .
*
* Assertions are like expectations , except they abort ( call
* kunit_try_catch_throw ( ) ) when the specified condition is not met . This is
* useful when you look at a test case as a logical statement about some piece
* of code , where assertions are the premises for the test case , and the
* conclusion is a set of predicates , rather expectations , that must all be
* true . If your premises are violated , it does not makes sense to continue .
*/
struct kunit_try_catch {
/* private: internal use only. */
struct kunit *test;
int try_result;
kunit_try_catch_func_t try ;
kunit_try_catch_func_t catch ;
unsigned long timeout;
void *context;
};
void kunit_try_catch_run(struct kunit_try_catch *try_catch, void *context);
void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch);
static inline int kunit_try_catch_get_result(struct kunit_try_catch *try_catch)
{
return try_catch->try_result;
}
#endif /* _KUNIT_TRY_CATCH_H */
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