blob: db72a8eca3d1679d5ff4a1801e72a7ef18e07fda (
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
|
#include "util/pool.hh"
#include "util/scoped.hh"
#include <stdlib.h>
namespace util {
Pool::Pool() {
current_ = NULL;
current_end_ = NULL;
}
Pool::~Pool() {
FreeAll();
}
void Pool::FreeAll() {
for (std::vector<void *>::const_iterator i(free_list_.begin()); i != free_list_.end(); ++i) {
free(*i);
}
free_list_.clear();
current_ = NULL;
current_end_ = NULL;
}
void *Pool::More(std::size_t size) {
// Double until we hit 2^21 (2 MB). Then grow in 2 MB blocks.
std::size_t desired_size = static_cast<size_t>(32) << std::min(static_cast<std::size_t>(16), free_list_.size());
std::size_t amount = std::max(desired_size, size);
uint8_t *ret = static_cast<uint8_t*>(MallocOrThrow(amount));
free_list_.push_back(ret);
current_ = ret + size;
current_end_ = ret + amount;
return ret;
}
} // namespace util
|
