2010-09-15 01:33:11 +04:00
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#ifndef UTIL_SCOPED__
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#define UTIL_SCOPED__
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2010-09-10 04:36:07 +04:00
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2011-09-21 20:06:48 +04:00
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#include "util/exception.hh"
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2010-09-10 04:36:07 +04:00
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2011-09-21 20:06:48 +04:00
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/* Other scoped objects in the style of scoped_ptr. */
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2010-09-10 04:36:07 +04:00
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#include <cstddef>
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2011-09-21 20:06:48 +04:00
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#include <cstdlib>
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2010-09-10 04:36:07 +04:00
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namespace util {
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2010-09-15 01:33:11 +04:00
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template <class T, class R, R (*Free)(T*)> class scoped_thing {
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2010-09-10 04:36:07 +04:00
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public:
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explicit scoped_thing(T *c = static_cast<T*>(0)) : c_(c) {}
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~scoped_thing() { if (c_) Free(c_); }
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void reset(T *c) {
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if (c_) Free(c_);
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c_ = c;
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}
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T &operator*() { return *c_; }
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2011-01-25 22:11:48 +03:00
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const T&operator*() const { return *c_; }
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2010-09-10 04:36:07 +04:00
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T &operator->() { return *c_; }
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2011-01-25 22:11:48 +03:00
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const T&operator->() const { return *c_; }
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2010-09-10 04:36:07 +04:00
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T *get() { return c_; }
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const T *get() const { return c_; }
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private:
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T *c_;
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2010-09-15 01:33:11 +04:00
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scoped_thing(const scoped_thing &);
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scoped_thing &operator=(const scoped_thing &);
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2010-09-10 04:36:07 +04:00
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};
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2011-09-21 20:06:48 +04:00
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class scoped_malloc {
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2010-09-10 04:36:07 +04:00
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public:
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scoped_malloc() : p_(NULL) {}
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2010-09-10 04:36:07 +04:00
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2011-09-21 20:06:48 +04:00
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scoped_malloc(void *p) : p_(p) {}
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2010-09-10 04:36:07 +04:00
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2011-09-21 20:06:48 +04:00
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~scoped_malloc() { std::free(p_); }
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2010-09-10 04:36:07 +04:00
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2011-09-21 20:06:48 +04:00
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void reset(void *p = NULL) {
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scoped_malloc other(p_);
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p_ = p;
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2010-09-10 04:36:07 +04:00
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}
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2011-09-21 20:06:48 +04:00
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void call_realloc(std::size_t to) {
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void *ret;
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2011-10-11 22:27:36 +04:00
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UTIL_THROW_IF(!(ret = std::realloc(p_, to)) && to, util::ErrnoException, "realloc to " << to << " bytes failed.");
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2011-09-21 20:06:48 +04:00
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p_ = ret;
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}
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2011-09-21 20:06:48 +04:00
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void *get() { return p_; }
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const void *get() const { return p_; }
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2010-10-27 08:04:23 +04:00
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private:
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2011-09-21 20:06:48 +04:00
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void *p_;
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scoped_malloc(const scoped_malloc &);
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scoped_malloc &operator=(const scoped_malloc &);
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2010-10-27 08:04:23 +04:00
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};
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2011-01-25 22:11:48 +03:00
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// Hat tip to boost.
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template <class T> class scoped_array {
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public:
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explicit scoped_array(T *content = NULL) : c_(content) {}
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~scoped_array() { delete [] c_; }
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T *get() { return c_; }
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const T* get() const { return c_; }
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T &operator*() { return *c_; }
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const T&operator*() const { return *c_; }
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T &operator->() { return *c_; }
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const T&operator->() const { return *c_; }
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T &operator[](std::size_t idx) { return c_[idx]; }
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const T &operator[](std::size_t idx) const { return c_[idx]; }
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void reset(T *to = NULL) {
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scoped_array<T> other(c_);
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c_ = to;
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}
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private:
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T *c_;
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};
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2010-09-10 04:36:07 +04:00
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} // namespace util
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2010-09-15 01:33:11 +04:00
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#endif // UTIL_SCOPED__
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