FFmpeg: libavutil/avassert.h File Reference

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libavutil

Macros | Functions

avassert.h File Reference

#include <stdlib.h>
#include "config.h"
#include "attributes.h"
#include "log.h"
#include "macros.h"

Go to the source code of this file.

Macros

#define av_assert0(cond)

assert() equivalent, that is always enabled. More...

#define av_assert1(cond) ((void)0)

assert() equivalent, that does not lie in speed critical code. More...

#define av_assert2(cond) ((void)0)

assert() equivalent, that does lie in speed critical code. More...

#define av_assert2_fpu() ((void)0)

#define av_unreachable(msg) ((void)0)

Asserts that are used as compiler optimization hints depending upon ASSERT_LEVEL and NBDEBUG. More...

#define av_assume(cond)

Functions

void av_assert0_fpu (void)

Assert that floating point operations can be executed. More...

Detailed Description

simple assert() macros that are a bit more flexible than ISO C assert().

Author: Michael Niedermayer micha.nosp@m.elni.nosp@m.@gmx..nosp@m.at

Definition in file avassert.h.

Macro Definition Documentation

◆ av_assert0

#define av_assert0 ( cond )

Value:

do { \

if (!(cond)) { \

av_log(NULL, AV_LOG_PANIC, "Assertion %s failed at %s:%d\n", \

AV_STRINGIFY(cond), __FILE__, __LINE__); \

abort(); \

} \

} while (0)

assert() equivalent, that is always enabled.

Examples: mux.c, and transcode_aac.c.

Definition at line 41 of file avassert.h.

◆ av_assert1

#define av_assert1 ( cond ) ((void)0)

assert() equivalent, that does not lie in speed critical code.

These asserts() thus can be enabled without fearing speed loss.

Definition at line 57 of file avassert.h.

◆ av_assert2

#define av_assert2 ( cond ) ((void)0)

assert() equivalent, that does lie in speed critical code.

Definition at line 68 of file avassert.h.

◆ av_assert2_fpu

#define av_assert2_fpu ( ) ((void)0)

Definition at line 69 of file avassert.h.

◆ av_unreachable

#define av_unreachable ( msg ) ((void)0)

Asserts that are used as compiler optimization hints depending upon ASSERT_LEVEL and NBDEBUG.

Undefined behaviour occurs if execution reaches a point marked with av_unreachable() or if a condition used with av_assume() is false.

The condition used with av_assume() should not have side-effects and should be visible to the compiler.

Definition at line 108 of file avassert.h.

◆ av_assume

#define av_assume ( cond )

Value:

do { \

if (!(cond)) \

av_unreachable(); \

} while (0)

Definition at line 111 of file avassert.h.

Function Documentation

◆ av_assert0_fpu()

void av_assert0_fpu ( void )

Assert that floating point operations can be executed.

This will av_assert0() that the cpu is not in MMX state on X86

Definition at line 103 of file utils.c.

AV_LOG_PANIC

#define AV_LOG_PANIC

Something went really wrong and we will crash now.

Definition: log.h:197

NULL

#define NULL

Definition: coverity.c:32

AV_STRINGIFY

#define AV_STRINGIFY(s)

Definition: macros.h:66

cond

int(* cond)(enum AVPixelFormat pix_fmt)

Definition: pixdesc_query.c:28

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