Thread-Local Storage (TLS)

This group contains the implementation to support thread-local storage (TLS). More...

Files
file	cpukit/include/rtems/score/tls.h
	This header file provides the interfaces of the Thread-Local Storage (TLS).
file	cpukit/score/src/tlsallocsize.c
	This source file contains the implementation of _TLS_Get_allocation_size().

Data Structures
struct	TLS_Configuration
	Represents the TLS configuration. More...
struct	TLS_Dynamic_thread_vector
struct	TLS_Thread_control_block
struct	TLS_Index

Typedefs
typedef struct TLS_Thread_control_block	TLS_Thread_control_block

Functions
uintptr_t	_TLS_Get_allocation_size (void)
	Gets the allocation size of the thread-local storage area in bytes.

Variables
const volatile TLS_Configuration	_TLS_Configuration
	Provides the TLS configuration.

Detailed Description

This group contains the implementation to support thread-local storage (TLS).

Variants I and II are according to Ulrich Drepper, "ELF Handling For Thread-Local Storage".

Function Documentation

_TLS_Get_allocation_size()

uintptr_t _TLS_Get_allocation_size

(

void

)

Gets the allocation size of the thread-local storage area in bytes.

Returns

Returns the allocation size of the thread-local storage area in bytes.

Variable Documentation

_TLS_Configuration

const volatile TLS_Configuration _TLS_Configuration

extern

Provides the TLS configuration.

Directly using symbols with an arbitrary absolute address such as _TLS_Alignment may not work with all code models (for example the AArch64 tiny and small code models). Store the addresses in a read-only object. Using the volatile qualifier ensures that the compiler actually loads the address from the object.