sbl::hal::memory Namespace Reference

Classes
struct	ArmMemoryBarrier
	Memory barrier policy for RingBuffer template. More...

Functions
void	compiler_barrier ()
	Compiler memory barrier.
void	data_barrier ()
	Data Memory Barrier (ARM DMB instruction)
void	sync_barrier ()
	Data Synchronization Barrier (ARM DSB instruction)
void	instruction_barrier ()
	Instruction Synchronization Barrier (ARM ISB instruction)

Function Documentation

compiler_barrier()

void sbl::hal::memory::compiler_barrier ( )

inline

Compiler memory barrier.

Prevents compiler from reordering memory operations. Sufficient for single-core ARM Cortex-M systems. Compiles to no instructions - affects compiler optimization only.

Note

ISR-safe — compiler-only barrier, zero instructions

Definition at line 26 of file barrier.hpp.

Referenced by data_barrier(), sbl::hal::memory::ArmMemoryBarrier::full_barrier(), instruction_barrier(), and sync_barrier().

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data_barrier()

void sbl::hal::memory::data_barrier ( )

inline

Data Memory Barrier (ARM DMB instruction)

Ensures all memory operations before the barrier complete before any memory operations after the barrier begin. Compiles to single ARM DMB instruction.

Note

ISR-safe — single DMB instruction

Definition at line 39 of file barrier.hpp.

References compiler_barrier().

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instruction_barrier()

void sbl::hal::memory::instruction_barrier ( )

inline

Instruction Synchronization Barrier (ARM ISB instruction)

Flushes pipeline and ensures all subsequent instructions are fetched from cache/memory after barrier effects complete. Compiles to single ARM ISB instruction.

Note

ISR-safe — single ISB instruction

Definition at line 73 of file barrier.hpp.

References compiler_barrier().

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sync_barrier()

void sbl::hal::memory::sync_barrier ( )

inline

Data Synchronization Barrier (ARM DSB instruction)

Ensures all memory operations and instructions complete before proceeding. Stronger than DMB. Compiles to single ARM DSB instruction.

Note

ISR-safe — single DSB instruction

Definition at line 56 of file barrier.hpp.

References compiler_barrier().

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