126 lines
2.4 KiB
C++
126 lines
2.4 KiB
C++
//===-- tsan_vector.h -------------------------------------------*- C++ -*-===//
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of ThreadSanitizer (TSan), a race detector.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// Low-fat STL-like vector container.
|
|
|
|
#ifndef TSAN_VECTOR_H
|
|
#define TSAN_VECTOR_H
|
|
|
|
#include "tsan_defs.h"
|
|
#include "tsan_mman.h"
|
|
|
|
namespace __tsan {
|
|
|
|
template<typename T>
|
|
class Vector {
|
|
public:
|
|
explicit Vector(MBlockType typ)
|
|
: typ_(typ)
|
|
, begin_()
|
|
, end_()
|
|
, last_() {
|
|
}
|
|
|
|
~Vector() {
|
|
if (begin_)
|
|
internal_free(begin_);
|
|
}
|
|
|
|
void Reset() {
|
|
if (begin_)
|
|
internal_free(begin_);
|
|
begin_ = 0;
|
|
end_ = 0;
|
|
last_ = 0;
|
|
}
|
|
|
|
uptr Size() const {
|
|
return end_ - begin_;
|
|
}
|
|
|
|
T &operator[](uptr i) {
|
|
DCHECK_LT(i, end_ - begin_);
|
|
return begin_[i];
|
|
}
|
|
|
|
const T &operator[](uptr i) const {
|
|
DCHECK_LT(i, end_ - begin_);
|
|
return begin_[i];
|
|
}
|
|
|
|
T *PushBack() {
|
|
EnsureSize(Size() + 1);
|
|
T *p = &end_[-1];
|
|
internal_memset(p, 0, sizeof(*p));
|
|
return p;
|
|
}
|
|
|
|
T *PushBack(const T& v) {
|
|
EnsureSize(Size() + 1);
|
|
T *p = &end_[-1];
|
|
internal_memcpy(p, &v, sizeof(*p));
|
|
return p;
|
|
}
|
|
|
|
void PopBack() {
|
|
DCHECK_GT(end_, begin_);
|
|
end_--;
|
|
}
|
|
|
|
void Resize(uptr size) {
|
|
if (size == 0) {
|
|
end_ = begin_;
|
|
return;
|
|
}
|
|
uptr old_size = Size();
|
|
EnsureSize(size);
|
|
if (old_size < size) {
|
|
for (uptr i = old_size; i < size; i++)
|
|
internal_memset(&begin_[i], 0, sizeof(begin_[i]));
|
|
}
|
|
}
|
|
|
|
private:
|
|
const MBlockType typ_;
|
|
T *begin_;
|
|
T *end_;
|
|
T *last_;
|
|
|
|
void EnsureSize(uptr size) {
|
|
if (size <= Size())
|
|
return;
|
|
if (size <= (uptr)(last_ - begin_)) {
|
|
end_ = begin_ + size;
|
|
return;
|
|
}
|
|
uptr cap0 = last_ - begin_;
|
|
uptr cap = cap0 * 5 / 4; // 25% growth
|
|
if (cap == 0)
|
|
cap = 16;
|
|
if (cap < size)
|
|
cap = size;
|
|
T *p = (T*)internal_alloc(typ_, cap * sizeof(T));
|
|
if (cap0) {
|
|
internal_memcpy(p, begin_, cap0 * sizeof(T));
|
|
internal_free(begin_);
|
|
}
|
|
begin_ = p;
|
|
end_ = begin_ + size;
|
|
last_ = begin_ + cap;
|
|
}
|
|
|
|
Vector(const Vector&);
|
|
void operator=(const Vector&);
|
|
};
|
|
} // namespace __tsan
|
|
|
|
#endif // #ifndef TSAN_VECTOR_H
|