From 754bbf7a25a8dda49b5d08ef0d0443bbf5af0e36 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Sun, 7 Apr 2024 13:41:34 -0500 Subject: new repository --- devdocs/c/atomic%2Fatomic_init.html | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 devdocs/c/atomic%2Fatomic_init.html (limited to 'devdocs/c/atomic%2Fatomic_init.html') diff --git a/devdocs/c/atomic%2Fatomic_init.html b/devdocs/c/atomic%2Fatomic_init.html new file mode 100644 index 00000000..a6790747 --- /dev/null +++ b/devdocs/c/atomic%2Fatomic_init.html @@ -0,0 +1,26 @@ +

atomic_init

Defined in header <stdatomic.h> 
void atomic_init( volatile A* obj, C desired );
+		 (since C11)

Initializes the default-constructed atomic object obj with the value desired. The function is not atomic: concurrent access from another thread, even through an atomic operation, is a data race.

+

This is a generic function defined for all atomic object types A. The argument is pointer to a volatile atomic type to accept addresses of both non-volatile and volatile (e.g. memory-mapped I/O) atomic objects, and volatile semantic is preserved when applying this operation to volatile atomic objects. C is the non-atomic type corresponding to A.

+

It is unspecified whether the name of a generic function is a macro or an identifier declared with external linkage. If a macro definition is suppressed in order to access an actual function (e.g. parenthesized like (atomic_init)(...)), or a program defines an external identifier with the name of a generic function, the behavior is undefined.

+

Parameters

+ + +
obj - pointer to an atomic object to initialize
desired - the value to initialize atomic object with

Return value

(none)

+

Notes

atomic_init is the only way to initialize dynamically-allocated atomic objects. For example:

+
_Atomic int *p = malloc(sizeof(_Atomic int));
+atomic_init(p, 42);

References

See also

+ +
+
(C11)(deprecated in C17)(removed in C23)
 initializes a new atomic object
(function macro)
C++ documentation for atomic_init
+

+ © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
+ https://en.cppreference.com/w/c/atomic/atomic_init +

+
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