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doc: atomic: provide explanation about why atomic_int_t is struct

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See also https://github.com/RIOT-OS/RIOT/pull/2321#issuecomment-72088818
This commit is contained in:
Martine Lenders 2016-02-16 13:43:10 +01:00
parent 0a65d8c558
commit c9f05efbb7
1 changed files with 3 additions and 0 deletions
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core/include/atomic.h
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@ -27,6 +27,9 @@ extern "C" {
/** /**
* @brief Integer variable for use in atomic counters. * @brief Integer variable for use in atomic counters.
*
* @note This type is a struct for hard type checking (let the compiler warn
* if int is assigned regularly).
*/ */
typedef struct atomic_int { typedef struct atomic_int {
volatile int value; /**< the actual value */ volatile int value; /**< the actual value */