WebSVN – HelenOS-historic – Diff – /kernel/trunk/generic/src/synch/futex.c



 
/** Sleep in futex wait queue.
 *
 * @param uaddr Userspace address of the futex counter.
 * @param usec If non-zero, number of microseconds this thread is willing to sleep.
 * @param trydown If usec is zero and trydown is non-zero, conditional operation will be attempted.
 *
 * @return One of ESYNCH_TIMEOUT, ESYNCH_OK_ATOMIC and ESYNCH_OK_BLOCKED. See synch.h.
 *     If there is no physical mapping for uaddr ENOENT is returned.
 */
__native sys_futex_sleep_timeout(__address uaddr, __u32 usec, int trydown)

    return futex;
}
 
/** Compute hash index into futex hash table.
 *
 * @param key Address where the key (i.e. physical address of futex counter) is stored.
 *
 * @return Index into futex hash table.
 */
index_t futex_ht_hash(__native *key)
{

 
/** Compare futex hash table item with a key.
 *
 * @param key Address where the key (i.e. physical address of futex counter) is stored.
 *
 * @return True if the item matches the key. False otherwise.
 */
bool futex_ht_compare(__native *key, count_t keys, link_t *item)
{
    futex_t *futex;
 

Subversion Repositories HelenOS-historic

(root)/kernel/trunk/generic/src/synch/futex.c – Rev 1229 → 1248

Rev 1229		Rev 1248
Line 91...		Line 91...
91		91
92	/** Sleep in futex wait queue.	92	/** Sleep in futex wait queue.
93	*	93	*
94	* @param uaddr Userspace address of the futex counter.	94	* @param uaddr Userspace address of the futex counter.
95	* @param usec If non-zero, number of microseconds this thread is willing to sleep.	95	* @param usec If non-zero, number of microseconds this thread is willing to sleep.
96	* @param trydown If @usec is zero and trydown is non-zero, conditional operation will be attempted.	96	* @param trydown If usec is zero and trydown is non-zero, conditional operation will be attempted.
97	*	97	*
98	* @return One of ESYNCH_TIMEOUT, ESYNCH_OK_ATOMIC and ESYNCH_OK_BLOCKED. See synch.h.	98	* @return One of ESYNCH_TIMEOUT, ESYNCH_OK_ATOMIC and ESYNCH_OK_BLOCKED. See synch.h.
99	* If there is no physical mapping for uaddr ENOENT is returned.	99	* If there is no physical mapping for uaddr ENOENT is returned.
100	*/	100	*/
101	__native sys_futex_sleep_timeout(__address uaddr, __u32 usec, int trydown)	101	__native sys_futex_sleep_timeout(__address uaddr, __u32 usec, int trydown)
Line 216...		Line 216...
216	return futex;	216	return futex;
217	}	217	}
218		218
219	/** Compute hash index into futex hash table.	219	/** Compute hash index into futex hash table.
220	*	220	*
221	* @param key Address where the @key (i.e. physical address of futex counter) is stored.	221	* @param key Address where the key (i.e. physical address of futex counter) is stored.
222	*	222	*
223	* @return Index into futex hash table.	223	* @return Index into futex hash table.
224	*/	224	*/
225	index_t futex_ht_hash(__native *key)	225	index_t futex_ht_hash(__native *key)
226	{	226	{
Line 229...		Line 229...
229		229
230	/** Compare futex hash table item with a key.	230	/** Compare futex hash table item with a key.
231	*	231	*
232	* @param key Address where the key (i.e. physical address of futex counter) is stored.	232	* @param key Address where the key (i.e. physical address of futex counter) is stored.
233	*	233	*
234	* @return True if the item matches the @key. False otherwise.	234	* @return True if the item matches the key. False otherwise.
235	*/	235	*/
236	bool futex_ht_compare(__native key, count_t keys, link_t item)	236	bool futex_ht_compare(__native key, count_t keys, link_t item)
237	{	237	{
238	futex_t *futex;	238	futex_t *futex;
239		239