blob: fc08bf9ee2077d10b34711d4796a56f0b5f5f6be (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
|
/* $Id$ */
/** @file oldpool_func.h Functions related to the old pool. */
#ifndef OLDPOOL_FUNC_H
#define OLDPOOL_FUNC_H
#include "oldpool.h"
/**
* Allocate a pool item; possibly allocate a new block in the pool.
* @param first the first pool item to start searching
* @pre first <= Tpool->GetSize()
* @return the allocated pool item (or NULL when the pool is full).
*/
template<typename T, typename Tid, OldMemoryPool<T> *Tpool> T *PoolItem<T, Tid, Tpool>::AllocateSafeRaw(uint &first)
{
uint last_minus_one = Tpool->GetSize() - 1;
for (T *t = Tpool->Get(first); t != NULL; t = ((uint)t->index < last_minus_one) ? Tpool->Get(t->index + 1U) : NULL) {
if (!t->IsValid()) {
first = t->index;
Tid index = t->index;
memset(t, 0, Tpool->item_size);
t->index = index;
return t;
}
}
/* Check if we can add a block to the pool */
if (Tpool->AddBlockToPool()) return AllocateRaw(first);
return NULL;
}
/**
* Check whether we can allocate an item in this pool. This to prevent the
* need to actually construct the object and then destructing it again,
* which could be *very* costly.
* @param count the number of items to create
* @return true if and only if at least count items can be allocated.
*/
template<typename T, typename Tid, OldMemoryPool<T> *Tpool> bool PoolItem<T, Tid, Tpool>::CanAllocateItem(uint count)
{
uint last_minus_one = Tpool->GetSize() - 1;
for (T *t = Tpool->Get(Tpool->first_free_index); count > 0 && t != NULL; t = ((uint)t->index < last_minus_one) ? Tpool->Get(t->index + 1U) : NULL) {
if (!t->IsValid()) count--;
}
if (count == 0) return true;
/* Check if we can add a block to the pool */
if (Tpool->AddBlockToPool()) return CanAllocateItem(count);
return false;
}
#endif /* OLDPOOL_FUNC_H */
|
