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Update libcomm_lqueue.cpp

This commit is contained in:
Eao3piq4e 2022-08-13 11:25:18 +08:00
parent 3446cb0aba
commit 19adb21866
1 changed files with 33 additions and 0 deletions
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33
src/gausskernel/cbb/communication/libcomm_utils/libcomm_lqueue.cpp
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@ -33,6 +33,16 @@ inline int mc_lqueue_item_size(struct mc_lqueue_item* q_item)
return q_item->element.data->iov_len;
}
/*
function name: mc_lqueue_add
description: Add an element to a specific queue.
arguments: The first parameter is a pointer of type (mc_lqueue *), whose member variable list points to the target queue.
The second parameter points to the element to be added to the queue.
return value: Returns 1 if the element is successfully added to the queue, otherwise returns - 1.
note: none
date: 2022/8/13
contact tel: 18720816902
*/
int mc_lqueue_add(struct mc_lqueue* q, struct mc_lqueue_item* q_item)
{
if (q == NULL || q_item == NULL) {
@ -60,6 +70,17 @@ int mc_lqueue_add(struct mc_lqueue* q, struct mc_lqueue_item* q_item)
return 1;
}
/*
function name: mc_lqueue_remove
description: Remove the head element in a specific queue.
arguments: The first parameter is a pointer of type (mc_lqueue *), whose member variable list points to the target queue.
The second parameter points to the queue head element used to store the removal from the queue.
return value: Return NULL if an error occurs during the removal of the queue head element, otherwise a pointer to
the successfully removed queue head element is returned.
note: none
date: 2022/8/13
contact tel: 18720816902
*/
struct mc_lqueue_item* mc_lqueue_remove(struct mc_lqueue* q, struct mc_lqueue_item* q_item)
{
if (q == NULL) {
@ -89,6 +110,18 @@ struct mc_lqueue_item* mc_lqueue_remove(struct mc_lqueue* q, struct mc_lqueue_it
return q_item;
}
/*
function name: mc_lqueue_init
description: This function is used to open an area in the memory area. One part of the area is used to store a queue with
a certain specification, and the other part is used to store the information of the queue, such as the specification
and the number of elements. Finally, a pointer to the area is returned.
arguments: This parameter specifies that the maximum number of elements that the queue can hold is size, but this does
not mean that the size of the queue is so large at the beginning.
return value: If the function runs successfully, it returns a pointer to the opened memory area; otherwise, it returns NULL.
note: none
date: 2022/8/13
contact tel: 18720816902
*/
struct mc_lqueue* mc_lqueue_init(unsigned long size)
{
if (size == 0) {