Zephyr API Documentation 3.7.99
A Scalable Open Source RTOS
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atomic.h File Reference
#include <stdbool.h>
#include <zephyr/toolchain.h>
#include <stddef.h>
#include <zephyr/sys/atomic_types.h>
#include <zephyr/types.h>
#include <zephyr/sys/util.h>
#include <zephyr/sys/atomic_builtin.h>

Go to the source code of this file.

Macros

#define ATOMIC_INIT(i)
 Initialize an atomic variable.
 
#define ATOMIC_PTR_INIT(p)
 Initialize an atomic pointer variable.
 
#define ATOMIC_BITMAP_SIZE(num_bits)
 This macro computes the number of atomic variables necessary to represent a bitmap with num_bits.
 
#define ATOMIC_DEFINE(name, num_bits)
 Define an array of atomic variables.
 

Functions

static bool atomic_test_bit (const atomic_t *target, int bit)
 Atomically get and test a bit.
 
static bool atomic_test_and_clear_bit (atomic_t *target, int bit)
 Atomically clear a bit and test it.
 
static bool atomic_test_and_set_bit (atomic_t *target, int bit)
 Atomically set a bit and test it.
 
static void atomic_clear_bit (atomic_t *target, int bit)
 Atomically clear a bit.
 
static void atomic_set_bit (atomic_t *target, int bit)
 Atomically set a bit.
 
static void atomic_set_bit_to (atomic_t *target, int bit, bool val)
 Atomically set a bit to a given value.
 
bool atomic_cas (atomic_t *target, atomic_val_t old_value, atomic_val_t new_value)
 Atomic compare-and-set.
 
bool atomic_ptr_cas (atomic_ptr_t *target, atomic_ptr_val_t old_value, atomic_ptr_val_t new_value)
 Atomic compare-and-set with pointer values.
 
atomic_val_t atomic_add (atomic_t *target, atomic_val_t value)
 Atomic addition.
 
atomic_val_t atomic_sub (atomic_t *target, atomic_val_t value)
 Atomic subtraction.
 
atomic_val_t atomic_inc (atomic_t *target)
 Atomic increment.
 
atomic_val_t atomic_dec (atomic_t *target)
 Atomic decrement.
 
atomic_val_t atomic_get (const atomic_t *target)
 Atomic get.
 
atomic_ptr_val_t atomic_ptr_get (const atomic_ptr_t *target)
 Atomic get a pointer value.
 
atomic_val_t atomic_set (atomic_t *target, atomic_val_t value)
 Atomic get-and-set.
 
atomic_ptr_val_t atomic_ptr_set (atomic_ptr_t *target, atomic_ptr_val_t value)
 Atomic get-and-set for pointer values.
 
atomic_val_t atomic_clear (atomic_t *target)
 Atomic clear.
 
atomic_ptr_val_t atomic_ptr_clear (atomic_ptr_t *target)
 Atomic clear of a pointer value.
 
atomic_val_t atomic_or (atomic_t *target, atomic_val_t value)
 Atomic bitwise inclusive OR.
 
atomic_val_t atomic_xor (atomic_t *target, atomic_val_t value)
 Atomic bitwise exclusive OR (XOR).
 
atomic_val_t atomic_and (atomic_t *target, atomic_val_t value)
 Atomic bitwise AND.
 
atomic_val_t atomic_nand (atomic_t *target, atomic_val_t value)
 Atomic bitwise NAND.