ut0wqueue.h

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/** @file include/ut0wqueue.h
 A work queue
 
 Created 4/26/2006 Osku Salerma
 ************************************************************************/
 
/** A Work queue. Threads can add work items to the queue and other threads can
 wait for work items to be available and take them off the queue for
 processing.
 ************************************************************************/
 
#ifndef IB_WORK_QUEUE_H
#define IB_WORK_QUEUE_H
 
#include "mem0mem.h"
#include "sync0sync.h"
#include "ut0list.h"
 
// Forward declaration
struct ib_list_t;
struct ib_wqueue_t;
 
/** Create a new work queue.
 @return work queue */
ib_wqueue_t *ib_wqueue_create();
 
/** Free a work queue. */
void ib_wqueue_free(ib_wqueue_t *wq); /*!< in: work queue */
 
/** Add a work item to the queue.
@param[in] wq Work queue
@param[in] item Work item
@param[in] heap Memory heap to use for allocating the list node */
void ib_wqueue_add(ib_wqueue_t *wq, void *item, mem_heap_t *heap);
 
/** read total number of work item to the queue.
@param[in] wq Work queue
@return total count of work item in the queue */
uint64_t ib_wqueue_get_count(ib_wqueue_t *wq);
 
/********************************************************************
Check if queue is empty. */
bool ib_wqueue_is_empty(
    /* out: true if queue empty
    else false */
    const ib_wqueue_t *wq); /* in: work queue */
 
/********************************************************************
Wait for a work item to appear in the queue for specified time. */
void *ib_wqueue_timedwait(
    /* out: work item or NULL on timeout*/
    ib_wqueue_t *wq,                 /* in: work queue */
    std::chrono::microseconds wait); /* in: wait time */
 
#endif /* IB_WORK_QUEUE_H */