ATOMIC_VAR_INIT macro expands to a token sequence suitable for
initializing an atomic object of a type that is initialization-compatible
An atomic object with automatic storage duration that is not explicitly
ATOMIC_VAR_INIT is initially in an indeterminate state;
however, the default (zero) initialization for objects with
duration is guaranteed to produce a valid state.
#define ATOMIC_VAR_INIT(C value)
This macro can only be used to initialize atomic objects that are declared
in program scope in the
global address space.
global atomic_int guide = ATOMIC_VAR_INIT(42);
Concurrent access to the variable being initialized, even via an atomic operation, constitutes a data-race.
For more information, see the OpenCL C Specification
This page is extracted from the OpenCL C Specification. Fixes and changes should be made to the Specification, not directly.