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critical_section struct
\file critical_section.h Critical Section API for short-lived mutual exclusion safe for IRQ and multi-core A critical section is non-reentrant, and provides mutual exclusion using a spin-lock to prevent access from the other core, and from (higher priority) interrupts on the same core. It does the former using a spin lock and the latter by disabling interrupts on the calling core. Because interrupts are disabled when a critical_section is owned, uses of the critical_section should be as short as possible.
Syntax
typedef struct __packed_aligned critical_section
{
spin_lock_t *spin_lock;
uint32_t save;
} critical_section_t;
Fields
Related Functions
Found 6 other functions taking a critical_section
argument:
Function
Description
Enter a critical_section If the spin lock associated with this critical section is in use, then this method will block until it is released.
Release a critical_section
Initialise a critical_section structure assigning a specific spin lock number
De-Initialise a critical_section created by the critical_section_init method This method is only used to free the associated spin lock allocated via the critical_section_init method (it should not be used to de-initialize a spin lock created via critical_section_init_with_lock_num). After this call, the critical section is invalid
Test whether a critical_section has been initialized
Initialise a critical_section structure allowing the system to assign a spin lock number The critical section is initialized ready for use, and will use a (possibly shared) spin lock number assigned by the system. Note that in general it is unlikely that you would be nesting critical sections, however if you do so you *must* use critical_section_init_with_lock_num to ensure that the spin locks used are different.