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Tiny Queue
Tiny Queues implements a 4 byte queue for iPhone events with just 1 byte of management overhead. More...
Data Structures | |
| struct | tinyQ_t |
| a tinyQ tracks a 4 byte queue with just 1 byte overhead More... | |
Functions | |
| int | Qpush (tinyQ_t *q, char c) |
| Push an Accessibility Event onto our queue for sending to the iphone. | |
| int | Qpop (tinyQ_t *q, char *c) |
| Pop an Accessibility Event off our queue for sending to the iphone. | |
Variables | |
| unsigned int | tail:8 |
| the bit depth MUST be that power of 2 that is the Q_SIZE | |
| unsigned int | fill:9 |
| Must be 1 bit bigger than the head and tail pointers. | |
| char | data [Q_SIZE] |
| NOTE: Q_SIZE MUST be == 2 ^ widthof( tinyQ_t.head ) | |
Detailed Description
Tiny Queues implements a 4 byte queue for iPhone events with just 1 byte of management overhead.
Head and Tail pointers both inherently wrap at the end of the buffer and no bounds checking is necesary IFF the buffer size is set as a power of 2 equal to the width of the pointers !! i.e head is 2 bits wide so the buffer must be 2^2 = 4 bytes deep.
Function Documentation
| int Qpop | ( | tinyQ_t * | q, |
| char * | c | ||
| ) |
| int Qpush | ( | tinyQ_t * | q, |
| char | c | ||
| ) |
Variable Documentation
char data[Q_SIZE] [inherited] |
NOTE: Q_SIZE MUST be == 2 ^ widthof( tinyQ_t.head )
unsigned int fill [inherited] |
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