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#include <string>
#include <utility>
#include "libipc/shm.h"
#include "libipc/utility/pimpl.h"
#include "libipc/memory/resource.h"
namespace ipc {
namespace shm {
class handle::handle_ : public pimpl<handle_> {
public:
shm::id_t id_ = nullptr;
void* m_ = nullptr;
ipc::string n_;
std::size_t s_ = 0;
};
handle::handle()
: p_(p_->make()) {
}
handle::handle(char const * name, std::size_t size, unsigned mode)
: handle() {
acquire(name, size, mode);
}
handle::handle(handle&& rhs)
: handle() {
swap(rhs);
}
handle::~handle() {
release();
p_->clear();
}
void handle::swap(handle& rhs) {
std::swap(p_, rhs.p_);
}
handle& handle::operator=(handle rhs) {
swap(rhs);
return *this;
}
bool handle::valid() const noexcept {
return impl(p_)->m_ != nullptr;
}
std::size_t handle::size() const noexcept {
return impl(p_)->s_;
}
char const * handle::name() const noexcept {
return impl(p_)->n_.c_str();
}
std::int32_t handle::ref() const noexcept {
return shm::get_ref(impl(p_)->id_);
}
void handle::sub_ref() noexcept {
shm::sub_ref(impl(p_)->id_);
}
bool handle::acquire(char const * name, std::size_t size, unsigned mode) {
release();
impl(p_)->id_ = shm::acquire((impl(p_)->n_ = name).c_str(), size, mode);
impl(p_)->m_ = shm::get_mem(impl(p_)->id_, &(impl(p_)->s_));
return valid();
}
std::int32_t handle::release() {
if (impl(p_)->id_ == nullptr) return -1;
return shm::release(detach());
}
void* handle::get() const {
return impl(p_)->m_;
}
void handle::attach(id_t id) {
if (id == nullptr) return;
release();
impl(p_)->id_ = id;
impl(p_)->m_ = shm::get_mem(impl(p_)->id_, &(impl(p_)->s_));
}
id_t handle::detach() {
auto old = impl(p_)->id_;
impl(p_)->id_ = nullptr;
impl(p_)->m_ = nullptr;
impl(p_)->s_ = 0;
impl(p_)->n_.clear();
return old;
}
} // namespace shm
} // namespace ipc
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