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Annotation of coherent/f/usr/include/kernel/_toid.h, revision 1.1.1.1

1.1       root        1: #ifndef        __KERNEL__TOID_H__
                      2: #define        __KERNEL__TOID_H__
                      3: 
                      4: /*
                      5:  * This internal header file is intended as the sole point of definition for
                      6:  * the DDI/DKI data type 'toid_t'. This type is used as a handle (or 'cookie')
                      7:  * for timeout events so that they can be cancelled after being scheduled. The
                      8:  * format of the handle data is opaque.
                      9:  *
                     10:  * Handles are never explicitly released in the DDI/DKI, so using a pointer to
                     11:  * an event cell may not be a good idea (that's the theory; in practice, most
                     12:  * clients of the DDI/DKI timeout system take care not to use a timeout handle
                     13:  * once the timeout has run).
                     14:  *
                     15:  * Since clients need to pass these items as parameters and assign them to
                     16:  * variables, a pointer to an incomplete type would be a natural
                     17:  * representation. However, since a pointer is inappropriate here, we use a
                     18:  * large scalar type. Clients are cautioned not to perform any operation other
                     19:  * than assignment on such items, however.
                     20:  */
                     21: 
                     22: typedef        unsigned long   toid_t;
                     23: 
                     24: 
                     25: /*
                     26:  * The maximum-value defined below can't be used without <limits.h>, but we
                     27:  * define it here because it depends critically on the type of toid_t.
                     28:  */
                     29: 
                     30: #define        TOID_MAX        ULONG_MAX
                     31: 
                     32: #endif /* ! defined (__KERNEL__TOID_H__) */
                     33: 

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