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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file Copyright.txt or https://cmake.org/licensing for details. */
#define cmUVHandlePtr_cxx
#include "cmUVHandlePtr.h"
#include <assert.h>
#include <stdlib.h>
#include "cm_thread.hxx"
#include "cm_uv.h"
namespace cm {
static void close_delete(uv_handle_t* h)
{
free(h);
}
template <typename T>
static void default_delete(T* type_handle)
{
auto handle = reinterpret_cast<uv_handle_t*>(type_handle);
if (handle) {
assert(!uv_is_closing(handle));
if (!uv_is_closing(handle)) {
uv_close(handle, &close_delete);
}
}
}
/**
* Encapsulates delete logic for a given handle type T
*/
template <typename T>
struct uv_handle_deleter
{
void operator()(T* type_handle) const { default_delete(type_handle); }
};
template <typename T>
void uv_handle_ptr_base_<T>::allocate(void* data)
{
reset();
/*
We use calloc since we know all these types are c structs
and we just want to 0 init them. New would do the same thing;
but casting from uv_handle_t to certain other types -- namely
uv_timer_t -- triggers a cast_align warning on certain systems.
*/
handle.reset(static_cast<T*>(calloc(1, sizeof(T))), uv_handle_deleter<T>());
handle->data = data;
}
template <typename T>
void uv_handle_ptr_base_<T>::reset()
{
handle.reset();
}
template <typename T>
uv_handle_ptr_base_<T>::operator uv_handle_t*()
{
return reinterpret_cast<uv_handle_t*>(handle.get());
}
template <typename T>
T* uv_handle_ptr_base_<T>::operator->() const noexcept
{
return handle.get();
}
template <typename T>
T* uv_handle_ptr_base_<T>::get() const
{
return handle.get();
}
template <typename T>
uv_handle_ptr_<T>::operator T*() const
{
return this->handle.get();
}
template <>
struct uv_handle_deleter<uv_async_t>
{
/***
* Wile uv_async_send is itself thread-safe, there are
* no strong guarantees that close hasn't already been
* called on the handle; and that it might be deleted
* as the send call goes through. This mutex guards
* against that.
*
* The shared_ptr here is to allow for copy construction
* which is mandated by the standard for Deleter on
* shared_ptrs.
*/
std::shared_ptr<cm::mutex> handleMutex;
uv_handle_deleter()
: handleMutex(std::make_shared<cm::mutex>())
{
}
void operator()(uv_async_t* handle)
{
cm::lock_guard<cm::mutex> lock(*handleMutex);
default_delete(handle);
}
};
void uv_async_ptr::send()
{
auto deleter = std::get_deleter<uv_handle_deleter<uv_async_t>>(this->handle);
assert(deleter);
cm::lock_guard<cm::mutex> lock(*deleter->handleMutex);
if (this->handle) {
uv_async_send(*this);
}
}
int uv_async_ptr::init(uv_loop_t& loop, uv_async_cb async_cb, void* data)
{
allocate(data);
return uv_async_init(&loop, handle.get(), async_cb);
}
template <>
struct uv_handle_deleter<uv_signal_t>
{
void operator()(uv_signal_t* handle) const
{
if (handle) {
uv_signal_stop(handle);
default_delete(handle);
}
}
};
int uv_signal_ptr::init(uv_loop_t& loop, void* data)
{
allocate(data);
return uv_signal_init(&loop, handle.get());
}
int uv_signal_ptr::start(uv_signal_cb cb, int signum)
{
assert(handle);
return uv_signal_start(*this, cb, signum);
}
void uv_signal_ptr::stop()
{
if (handle) {
uv_signal_stop(*this);
}
}
int uv_pipe_ptr::init(uv_loop_t& loop, int ipc, void* data)
{
allocate(data);
return uv_pipe_init(&loop, *this, ipc);
}
uv_pipe_ptr::operator uv_stream_t*() const
{
return reinterpret_cast<uv_stream_t*>(handle.get());
}
uv_tty_ptr::operator uv_stream_t*() const
{
return reinterpret_cast<uv_stream_t*>(handle.get());
}
int uv_tty_ptr::init(uv_loop_t& loop, int fd, int readable, void* data)
{
allocate(data);
return uv_tty_init(&loop, *this, fd, readable);
}
template class uv_handle_ptr_base_<uv_handle_t>;
#define UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(NAME) \
template class uv_handle_ptr_base_<uv_##NAME##_t>; \
template class uv_handle_ptr_<uv_##NAME##_t>;
UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(async)
UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(signal)
UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(pipe)
UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(stream)
UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(tty)
}
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