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SourceVuESP-IDF Framework and ExamplesESP-IDFesp_cpu_compare_and_set()

esp_cpu_compare_and_set() function

Atomic compare-and-set operation

Syntax

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Summary

Declaration

Definition

from esp_cpu.h:571

bool esp_cpu_compare_and_set(volatile uint32_t *addr, uint32_t compare_value, uint32_t new_value);

Implemented in cpu.c:199

Arguments

Argument

Description

addr

Address of atomic variable

compare_value

Value to compare the atomic variable to

new_value

New value to set the atomic variable to

Return value

Whether the atomic variable was set or not

Examples

esp_cpu_compare_and_set() is referenced by 1 libraries and example projects:

mbedTLS

References

from 0/1 examples

Code

Location

Referrer

bool esp_cpu_compare_and_set(volatile uint32_t *addr, uint32_t compare_value, uint32_t new_value)

cpu.c:199

bool esp_cpu_compare_and_set(volatile uint32_t *addr, uint32_t compare_value, uint32_t new_value);

esp_cpu.h:571

if (esp_cpu_compare_and_set((volatile uint32_t *)&s_no_block_func[cpu_id], 0, (uint32_t)func)) {

esp_ipc.c:188

esp_ipc_call_nonblocking()

if (esp_cpu_compare_and_set((volatile uint32_t *)&once_control->init_executed, 0, 1)) {

pthread.c:603

pthread_once()

lock_set = esp_cpu_compare_and_set(&lock->owner, SPINLOCK_FREE, core_owner_id);

spinlock.h:123

spinlock_acquire()

lock_set = esp_cpu_compare_and_set(&lock->owner, SPINLOCK_FREE, core_owner_id);

spinlock.h:132

spinlock_acquire()

Call Tree

from 0/1 examples

esp_cpu_compare_and_set() is called by 3 functions and calls 1 function:

spinlock_acquire()

esp_ipc_call_nonblocking()

pthread_once()

esp_cpu_compare_and_set()

xt_utils_compare_and_set()

Data Use

from 0/1 examples

esp_cpu_compare_and_set() writes 1 variable:

esp_cpu_compare_and_set()

external_ram_cas_lock

Class Tree

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Implementations

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Instances

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Lifecycle

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