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author | inmarket <andrewh@inmarket.com.au> | 2013-06-10 17:18:01 +1000 |
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committer | inmarket <andrewh@inmarket.com.au> | 2013-06-10 17:18:01 +1000 |
commit | 2cb35d6815a0a12035f4792c266b688c77085620 (patch) | |
tree | 292ebc4760767d67b41f7f0e0022185afcf05067 /include/gqueue | |
parent | 777ec6af7c1b594f7b7a9cbaaf7ead90d8fb7e8f (diff) | |
download | uGFX-2cb35d6815a0a12035f4792c266b688c77085620.tar.gz uGFX-2cb35d6815a0a12035f4792c266b688c77085620.tar.bz2 uGFX-2cb35d6815a0a12035f4792c266b688c77085620.zip |
Clean up GWIN Event assignment. Optimise event efficiency.
Diffstat (limited to 'include/gqueue')
-rw-r--r-- | include/gqueue/gqueue.h | 44 |
1 files changed, 42 insertions, 2 deletions
diff --git a/include/gqueue/gqueue.h b/include/gqueue/gqueue.h index 38c1908d..399042d9 100644 --- a/include/gqueue/gqueue.h +++ b/include/gqueue/gqueue.h @@ -103,7 +103,7 @@ void gfxQueueFSyncInit(gfxQueueFSync *pqueue); /* @} */ /** - * @brief Get an item from the head of the queue. + * @brief Get an item from the head of the queue (and remove it from the queue). * @return NULL if the timeout expires before an item is available * * @param[in] pqueue A pointer to the queue @@ -139,7 +139,7 @@ bool_t gfxQueueFSyncPut(gfxQueueFSync *pqueue, gfxQueueFSyncItem *pitem, delayti /* @} */ /** - * @brief Pop an item from the head of the queue. + * @brief Pop an item from the head of the queue (and remove it from the queue). * @detail This is exactly the same as the Get operation above. * * @api @@ -220,6 +220,46 @@ bool_t gfxQueueGSyncIsIn(gfxQueueGSync *pqueue, gfxQueueGSyncItem *pitem); bool_t gfxQueueFSyncIsIn(gfxQueueFSync *pqueue, gfxQueueFSyncItem *pitem); /* @} */ +/** + * @brief Get the first item from the head of the queue but do not remove it from the queue. + * @return NULL if no item is available. + * + * @param[in] pqueue A pointer to the queue + * + * @note This call does not block. + * @note This can be used as the first call to iterate all the elements in the queue. + * @note As that item is still on the queue, it should be treated as read-only. It could + * also be removed from the queue at any time by another thread (thereby altering the + * queue item). + * + * @api + * @{ + */ +#define gfxQueueASyncPeek(pqueue) ((const gfxQueueASyncItem *)((pqueue)->head)) +#define gfxQueueGSyncPeek(pqueue) ((const gfxQueueGSyncItem *)((pqueue)->head)) +#define gfxQueueFSyncPeek(pqueue) ((const gfxQueueFSyncItem *)((pqueue)->head)) +/* @} */ + +/** + * @brief Get the next item in the queue (but do not remove it from the queue). + * @return NULL if no item is available. + * + * @param[in] pitem The previous item in the queue + * + * @note This call does not block. + * @note This can be used as subsequent calls to iterate all the elements in the queue. + * @note As that item is still on the queue, it should be treated as read-only. It could + * also be removed from the queue at any time by another thread (thereby altering the + * queue item). + * + * @api + * @{ + */ +#define gfxQueueASyncNext(pitem) ((const gfxQueueASyncItem *)((pitem)->next)) +#define gfxQueueGSyncNext(pitem) ((const gfxQueueGSyncItem *)((pitem)->next)) +#define gfxQueueFSyncNext(pitem) ((const gfxQueueFSyncItem *)((pitem)->next)) +/* @} */ + #ifdef __cplusplus } #endif |