本文整理汇总了C++中Pool::Alloc方法的典型用法代码示例。如果您正苦于以下问题：C++ Pool::Alloc方法的具体用法？C++ Pool::Alloc怎么用？C++ Pool::Alloc使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Pool的用法示例。
在下文中一共展示了Pool::Alloc方法的4个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1:
String::String( Pool& p )
{
buf = (char*)p.Alloc();
bufLen = p.ItemBufLen();
dataLen = 0;
disposer = &p;
buf[ 0 ] = '\0';
}示例2: assert
String::String( Pool& p, char const* _buf, int _dataLen )
{
assert( p.ItemBufLen() - ( int )sizeof( Pool* ) >= _dataLen + 1 );
buf = (char*)p.Alloc();
bufLen = p.ItemBufLen();
dataLen = _dataLen;
disposer = &p;
memcpy( buf, _buf, _dataLen );
buf[ _dataLen ] = '\0';
}示例3: int
/** \brief Init a Pool
*
* PoolInit() creates a ::Pool. The Alloc function must only do
* allocation stuff. The Cleanup function must not try to free
* the PoolBucket::data. This is done by the ::Pool management
* system.
*
* \param size
* \param prealloc_size
* \param elt_size Memory size of an element
* \param Alloc An allocation function or NULL to use a standard SCMalloc
* \param Init An init function or NULL to use a standard memset to 0
* \param InitData Init data
* \Param Cleanup a free function or NULL if no special treatment is needed
* \retval the allocated Pool
*/
Pool *PoolInit(uint32_t size, uint32_t prealloc_size, uint32_t elt_size, void *(*Alloc)(), int (*Init)(void *, void *), void *InitData, void (*Cleanup)(void *))
{
Pool *p = NULL;
if (size != 0 && prealloc_size > size)
goto error;
/* setup the filter */
p = SCMalloc(sizeof(Pool));
if (p == NULL)
goto error;
memset(p,0,sizeof(Pool));
p->max_buckets = size;
p->preallocated = prealloc_size;
p->elt_size = elt_size;
p->data_buffer_size = prealloc_size * elt_size;
p->Alloc = Alloc;
p->Init = Init;
p->InitData = InitData;
p->Cleanup = Cleanup;
if (p->Init == NULL) {
p->Init = PoolMemset;
p->InitData = p;
}
/* alloc the buckets and place them in the empty list */
uint32_t u32 = 0;
if (size > 0) {
PoolBucket *pb = SCCalloc(size, sizeof(PoolBucket));
p->pb_buffer = pb;
if (pb == NULL)
goto error;
memset(pb, 0, size * sizeof(PoolBucket));
for (u32 = 0; u32 < size; u32++) {
/* populate pool */
pb->next = p->empty_list;
pb->flags |= POOL_BUCKET_PREALLOCATED;
p->empty_list = pb;
p->empty_list_size++;
pb++;
}
}
p->data_buffer = SCCalloc(prealloc_size, elt_size);
/* FIXME better goto */
if (p->data_buffer == NULL)
goto error;
/* prealloc the buckets and requeue them to the alloc list */
for (u32 = 0; u32 < prealloc_size; u32++) {
if (size == 0) { /* unlimited */
PoolBucket *pb = SCMalloc(sizeof(PoolBucket));
if (pb == NULL)
goto error;
memset(pb, 0, sizeof(PoolBucket));
if (p->Alloc) {
pb->data = p->Alloc();
} else {
pb->data = SCMalloc(p->elt_size);
}
if (pb->data == NULL) {
SCFree(pb);
goto error;
}
if (p->Init(pb->data, p->InitData) != 1) {
if (p->Cleanup)
p->Cleanup(pb->data);
SCFree(pb->data);
SCFree(pb);
goto error;
}
p->allocated++;
pb->next = p->alloc_list;
p->alloc_list = pb;
p->alloc_list_size++;
} else {
PoolBucket *pb = p->empty_list;
if (pb == NULL)
goto error;
//.........这里部分代码省略.........
示例4: void
Pool *PoolInit(uint32_t size, uint32_t prealloc_size, void *(*Alloc)(void *), void *AllocData, void (*Free)(void *))
{
Pool *p = NULL;
if (Alloc == NULL) {
//printf("ERROR: PoolInit no Hash function\n");
goto error;
}
if (size != 0 && prealloc_size > size)
goto error;
/* setup the filter */
p = SCMalloc(sizeof(Pool));
if (p == NULL)
goto error;
memset(p,0,sizeof(Pool));
p->max_buckets = size;
p->Alloc = Alloc;
p->AllocData = AllocData;
p->Free = Free;
/* alloc the buckets and place them in the empty list */
uint32_t u32 = 0;
for (u32 = 0; u32 < size; u32++) {
/* populate pool */
PoolBucket *pb = SCMalloc(sizeof(PoolBucket));
if (pb == NULL)
goto error;
memset(pb, 0, sizeof(PoolBucket));
pb->next = p->empty_list;
p->empty_list = pb;
p->empty_list_size++;
}
/* prealloc the buckets and requeue them to the alloc list */
for (u32 = 0; u32 < prealloc_size; u32++) {
if (size == 0) { /* unlimited */
PoolBucket *pb = SCMalloc(sizeof(PoolBucket));
if (pb == NULL)
goto error;
memset(pb, 0, sizeof(PoolBucket));
pb->data = p->Alloc(p->AllocData);
p->allocated++;
pb->next = p->alloc_list;
p->alloc_list = pb;
p->alloc_list_size++;
} else {
PoolBucket *pb = p->empty_list;
if (pb == NULL)
goto error;
p->empty_list = pb->next;
p->empty_list_size--;
pb->data = p->Alloc(p->AllocData);
p->allocated++;
pb->next = p->alloc_list;
p->alloc_list = pb;
p->alloc_list_size++;
}
}
return p;
error:
/* XXX */
return NULL;
}