GNU C++ one-time construction API

Collaboration diagram for GNU C++ one-time construction API:

Data Structures
struct	CxaGuardObject_t

Functions
int	__cxa_guard_acquire (CxaGuardObject_t *guard_object)
	Acquire __cxa_guard mutex.
void	__cxa_guard_abort (CxaGuardObject_t *guard_object)
	Abort __cxa_guard mutex.
void	__cxa_guard_release (CxaGuardObject_t *guard_object)
	Release __cxa_guard mutex.

Variables
static LockingData_t	__cxa_guard_mutex = LOCKING_DATA_INIT

Detailed Description

See also

https://itanium-cxx-abi.github.io/cxx-abi/abi.html#once-ctor

When building for C++, please make sure that -fno-threadsafe-statics is not passed to the compiler

Function Documentation

__cxa_guard_abort()

void __cxa_guard_abort

(

CxaGuardObject_t *

guard_object

)

Abort __cxa_guard mutex.

Parameters

guard_object

Guard object

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__cxa_guard_acquire()

int __cxa_guard_acquire

(

CxaGuardObject_t *

guard_object

)

Acquire __cxa_guard mutex.

Parameters

guard_object

Guard object

Returns

0 if object is initialized, else initialization of object required

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__cxa_guard_release()

void __cxa_guard_release

(

CxaGuardObject_t *

guard_object

)

Release __cxa_guard mutex.

Parameters

guard_object

Guard object

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Variable Documentation

__cxa_guard_mutex

LockingData_t __cxa_guard_mutex = LOCKING_DATA_INIT

static

Mutex used in __cxa_guard_acquire, __cxa_guard_release and __cxa_guard_abort