*/
/** @file
- * @defgroup libmemif
+ * @defgroup libmemif Example libmemif App
*/
#ifndef _LIBMEMIF_H_
MEMIF_ERR_MAXREG, /*!< max region limit reached */
MEMIF_ERR_MAXRING, /*!< max ring limit reached */
MEMIF_ERR_NO_INTFD, /*!< missing interrupt fd */
- MEMIF_ERR_DISCONNECT, /*!< disconenct received */
+ MEMIF_ERR_DISCONNECT, /*!< disconnect received */
MEMIF_ERR_DISCONNECTED, /*!< peer interface disconnected */
MEMIF_ERR_UNKNOWN_MSG, /*!< unknown message type */
MEMIF_ERR_POLL_CANCEL, /*!< memif_poll_event() was cancelled */
* @{
*/
-/** user needs to set events that occured on fd and pass them to memif_control_fd_handler */
+/** user needs to set events that occurred on fd and pass them to memif_control_fd_handler */
#define MEMIF_FD_EVENT_READ (1 << 0)
#define MEMIF_FD_EVENT_WRITE (1 << 1)
-/** inform libmemif that error occured on fd */
+/** inform libmemif that error occurred on fd */
#define MEMIF_FD_EVENT_ERROR (1 << 2)
/** if set, informs that fd is going to be closed (user may want to stop watching for events on this fd) */
#define MEMIF_FD_EVENT_DEL (1 << 3)
/** \brief Memif control file descriptor update (callback function)
@param fd - new file descriptor to watch
@param events - event type(s) to watch for
+ @param private_ctx - libmemif main private context. Is NULL for
+ libmemif main created by memif_init()
+
This callback is called when there is new fd to watch for events on
or if fd is about to be closed (user mey want to stop watching for events on this fd).
+ Private context is taken from libmemif_main, 'private_ctx' passed to memif_per_thread_init()
+ or NULL in case of memif_init()
*/
typedef int (memif_control_fd_update_t) (int fd, uint8_t events,
void *private_ctx);
typedef int (memif_connection_update_t) (memif_conn_handle_t conn,
void *private_ctx);
-/** \brief Memif interrupt occured (callback function)
+/** \brief Memif interrupt occurred (callback function)
@param conn - memif connection handle
@param private_ctx - private context
- @param qid - queue id on which interrupt occured
+ @param qid - queue id on which interrupt occurred
Called when event is received on interrupt fd.
*/
@param gr - get external region addr callback
@param dr - delete external region callback
@param go - get external buffer offset callback (optional)
-*/
+
void memif_per_thread_register_external_region (memif_per_thread_main_handle_t
pt_main,
memif_add_external_region_t *
memif_get_external_buffer_offset_t
* go);
-/** @} */
+ @} */
/**
* @defgroup ARGS_N_BUFS Connection arguments and buffers
Custom database does not create a default socket
(see memif_per_thread_init).
Memif connection is stored in the same database as the socket.
- @param secret - otional parameter used as interface autenthication
+ @param secret - optional parameter used as interface authentication
@param num_s2m_rings - number of slave to master rings
@param num_m2s_rings - number of master to slave rings
@param buffer_size - size of buffer in shared memory
typedef struct
{
uint16_t desc_index;
- void *ring;
+ void *queue;
uint32_t len;
/** next buffer present (chained buffers) */
#define MEMIF_BUFFER_FLAG_NEXT (1 << 0)
-/** states that buffer is from rx ring */
-#define MEMIF_BUFFER_FLAG_RX (1 << 1)
uint8_t flags;
void *data;
} memif_buffer_t;
/** \brief Memif queue details
@param region - region index
@param qid - queue id
- @param ring_size - size of ring buffer in sharem memory
+ @param ring_size - size of ring buffer in shared memory
@param flags - ring flags
@param head - ring head pointer
@param tail - ring tail pointer
- @param buffer_size - buffer size on sharem memory
+ @param buffer_size - buffer size on shared memory
*/
typedef struct
{
*/
uint16_t memif_get_version ();
-/** \biref Memif get queue event file descriptor
+/** \brief Memif get queue event file descriptor
@param conn - memif connection handle
@param qid - queue id
@param[out] fd - returns event file descriptor
char *memif_strerror (int err_code);
/** \brief Memif get details
- @param conn - memif conenction handle
+ @param conn - memif connection handle
@param md - pointer to memif details struct
@param buf - buffer containing details strings
@param buflen - length of buffer
/** \brief Memif initialization
@param on_control_fd_update - if control fd updates inform user to watch new fd
@param app_name - application name (will be truncated to 32 chars)
- @param memif_alloc - cutom memory allocator, NULL = default
+ @param memif_alloc - custom memory allocator, NULL = default
@param memif_realloc - custom memory reallocation, NULL = default
@param memif_free - custom memory free, NULL = default
@param private_ctx - private context
@param on_control_fd_update - if control fd updates inform user to watch new fd
@param app_name - application name (will be truncated to 32 chars)
- @param memif_alloc - cutom memory allocator, NULL = default
+ @param memif_alloc - custom memory allocator, NULL = default
@param memif_realloc - custom memory reallocation, NULL = default
@param memif_free - custom memory free, NULL = default
@param on_connect - inform user about connected status
@param on_disconnect - inform user about disconnected status
@param on_interrupt - informs user about interrupt, if set to null user will not be notified about interrupt, user can use memif_get_queue_efd call to get interrupt fd to poll for events
- @param private_ctx - private contex passed back to user with callback
+ @param private_ctx - private context passed back to user with callback
Creates memory interface.
On success new fd is passed to user with memif_control_fd_update_t.
MASTER-MODE -
- Create listener socket and pass fd to user with memif_cntrol_fd_update_t.
+ Create listener socket and pass fd to user with memif_control_fd_update_t.
If this fd is passed to memif_control_fd_handler accept will be called and
new fd will be passed to user with memif_control_fd_update_t.
memif_interrupt_t * on_interrupt, void *private_ctx);
/** \brief Memif control file descriptor handler
- @param fd - file descriptor on which the event occured
- @param events - event type(s) that occured
+ @param fd - file descriptor on which the event occurred
+ @param events - event type(s) that occurred
- If event occures on any control fd, call memif_control_fd_handler.
- Internal - lib will "identify" fd (timerfd, lsitener, control) and handle event accordingly.
+ If event occurs on any control fd, call memif_control_fd_handler.
+ Internal - lib will "identify" fd (timerfd, listener, control) and handle event accordingly.
FD-TYPE -
TIMERFD -
/** \brief Memif per thread control file descriptor handler
@param pt_main - per thread main handle
- @param fd - file descriptor on which the event occured
- @param events - event type(s) that occured
+ @param fd - file descriptor on which the event occurred
+ @param events - event type(s) that occurred
Per thread version of memif_control_fd_handler.
int memif_delete (memif_conn_handle_t * conn);
/** \brief Memif buffer enq tx
- @param conn - memif conenction handle
- @param qid - number indentifying queue
+ @param conn - memif connection handle
+ @param qid - number identifying queue
@param bufs - memif buffers
- @param count - number of memif buffers to enque
+ @param count - number of memif buffers to enqueue
@param count_out - returns number of allocated buffers
- Slave is producer of buffers.
+ Enqueue buffers to specified tx queue. Can only be used by slave.
+ Updates desc_index field for each memif buffer.
If connection handle points to master returns MEMIF_ERR_INVAL_ARG.
\return memif_err_t
memif_buffer_t * bufs, uint16_t count,
uint16_t * count_out);
+/** \brief Memif buffer enq tx at idx
+ @param conn - memif connection handle
+ @param buf_a - memif buffer
+ @param buf_b - memif buffer
+
+ Swap descriptors for provided buffers and update the buffers
+*/
+int memif_buffer_requeue (memif_conn_handle_t conn, memif_buffer_t *buf_a,
+ memif_buffer_t *buf_b);
+
/** \brief Memif buffer alloc
- @param conn - memif conenction handle
- @param qid - number indentifying queue
+ @param conn - memif connection handle
+ @param qid - number identifying queue
@param bufs - memif buffers
@param count - number of memif buffers to allocate
@param count_out - returns number of allocated buffers
memif_buffer_t * bufs, uint16_t count,
uint16_t * count_out, uint16_t size);
-/** \brief Memif refill ring
- @param conn - memif conenction handle
- @param qid - number indentifying queue
+/** \brief Memif set next free buffer
+ @param conn - memif connection handle
+ @param qid - number identifying queue
+ @param buf - next free buffer
+
+ Sets next free descriptor pointer for specified tx queue.
+ The next allocation will happen at this buffer.
+*/
+int memif_set_next_free_buffer (memif_conn_handle_t conn, uint16_t qid,
+ memif_buffer_t *buf);
+
+/** \brief Memif refill queue
+ @param conn - memif connection handle
+ @param qid - number identifying queue
@param count - number of buffers to be placed on ring
@param headroom - offset the buffer by headroom
uint16_t count, uint16_t headroom);
/** \brief Memif transmit buffer burst
- @param conn - memif conenction handle
- @param qid - number indentifying queue
+ @param conn - memif connection handle
+ @param qid - number identifying queue
@param bufs - memif buffers
@param count - number of memif buffers to transmit
@param tx - returns number of transmitted buffers
memif_buffer_t * bufs, uint16_t count, uint16_t * tx);
/** \brief Memif receive buffer burst
- @param conn - memif conenction handle
- @param qid - number indentifying queue
+ @param conn - memif connection handle
+ @param qid - number identifying queue
@param bufs - memif buffers
@param count - number of memif buffers to receive
@param rx - returns number of received buffers
+ Consume interrupt event for receive queue.
+ The event is not consumed, if memif_rx_burst fails.
+
\return memif_err_t
*/
int memif_rx_burst (memif_conn_handle_t conn, uint16_t qid,
*/
int memif_poll_event (int timeout);
-/** \brief Memif poll event
+/** \brief Memif per thread poll event
@param pt_main - per thread main handle
@param timeout - timeout in seconds
/** \brief Send signal to stop concurrently running memif_poll_event().
The function, however, does not wait for memif_poll_event() to stop.
- memif_poll_event() may still return simply because an event has occured
+ memif_poll_event() may still return simply because an event has occurred
or the timeout has elapsed, but if called repeatedly in an infinite loop,
- a canceled memif_poll_event() is guaranted to return MEMIF_ERR_POLL_CANCEL
+ a canceled memif_poll_event() is guaranteed to return MEMIF_ERR_POLL_CANCEL
in the shortest possible time.
This feature was not available in the first release.
Use macro MEMIF_HAVE_CANCEL_POLL_EVENT to check if the feature is present.
The first time an interface is assigned a socket, its type is determined.
For master role it's 'listener', for slave role it's 'client'. Each interface
- requires socket of its respective type. Default socket is creted if no
+ requires socket of its respective type. Default socket is created if no
socket handle is passed to memif_create(). It's private context is NULL.
If all interfaces using this socket are deleted, the socket returns
to its default state.
@param filename - path to socket file
@param private_ctx - private context
- Per thread version of memif_create_sopcket.
+ Per thread version of memif_create_socket.
\return memif_err_t
*/
Return constant pointer to socket filename.
- \return cosnt char *
+ \return const char *
*/
const char *memif_get_socket_filename (memif_socket_handle_t sock);
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