fifo32 header¶
The documentation of QEMU’s qemu/fifo32.h header.
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void
fifo32_create(Fifo32 * fifo, uint32_t capacity)¶
Parameters
Fifo32 * fifo- struct Fifo32 to initialise with new FIFO
uint32_t capacity- capacity of the newly created FIFO expressed in 32 bit words
Description
Create a FIFO of the specified size. Clients should call fifo32_destroy() when finished using the fifo. The FIFO is initially empty.
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void
fifo32_destroy(Fifo32 * fifo)¶
Parameters
Fifo32 * fifo- FIFO to cleanup
Description
Cleanup a FIFO created with fifo32_create(). Frees memory created for FIFO storage. The FIFO is no longer usable after this has been called.
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uint32_t
fifo32_num_free(Fifo32 * fifo)¶
Parameters
Fifo32 * fifo- FIFO to check
Description
Return the number of free uint32_t slots in the FIFO.
Return
Number of free 32 bit words.
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uint32_t
fifo32_num_used(Fifo32 * fifo)¶
Parameters
Fifo32 * fifo- FIFO to check
Description
Return the number of used uint32_t slots in the FIFO.
Return
Number of used 32 bit words.
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void
fifo32_push(Fifo32 * fifo, uint32_t data)¶
Parameters
Fifo32 * fifo- FIFO to push to
uint32_t data- 32 bits data word to push
Description
Push a 32 bits data word to the FIFO. Behaviour is undefined if the FIFO is full. Clients are responsible for checking for fullness using fifo32_is_full().
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void
fifo32_push_all(Fifo32 * fifo, const uint32_t * data, uint32_t num)¶
Parameters
Fifo32 * fifo- FIFO to push to
const uint32_t * data- data to push
uint32_t num- undescribed
Description
Push a 32 bit word array to the FIFO. Behaviour is undefined if the FIFO is full. Clients are responsible for checking the space left in the FIFO using fifo32_num_free().
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uint32_t
fifo32_pop(Fifo32 * fifo)¶
Parameters
Fifo32 * fifo- fifo to pop from
Description
Pop a 32 bits data word from the FIFO. Behaviour is undefined if the FIFO is empty. Clients are responsible for checking for emptiness using fifo32_is_empty().
Return
The popped 32 bits data word.
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void
fifo32_reset(Fifo32 * fifo)¶
Parameters
Fifo32 * fifo- undescribed
Description
as a set of native-order words.
Parameters
Fifo32 * fifo- FIFO to check
Description
Check if a FIFO is empty.
Return
True if the fifo is empty, false otherwise.
Parameters
Fifo32 * fifo- FIFO to check
Description
Check if a FIFO is full.
Return
True if the fifo is full, false otherwise.