summaryrefslogtreecommitdiffstats
path: root/Source/cmUVHandlePtr.cxx
blob: df2f64ec5ed082ffbe8828577f7075085afbce16 (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
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
/* 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 <cassert>
#include <cstdlib>
#include <mutex>

#include <cm3p/uv.h>

namespace cm {

struct uv_loop_deleter
{
  void operator()(uv_loop_t* loop) const;
};

void uv_loop_deleter::operator()(uv_loop_t* loop) const
{
  uv_run(loop, UV_RUN_DEFAULT);
  int result = uv_loop_close(loop);
  (void)result;
  assert(result >= 0);
  free(loop);
}

int uv_loop_ptr::init(void* data)
{
  this->reset();

  this->loop.reset(static_cast<uv_loop_t*>(calloc(1, sizeof(uv_loop_t))),
                   uv_loop_deleter());
  this->loop->data = data;

  return uv_loop_init(this->loop.get());
}

void uv_loop_ptr::reset()
{
  this->loop.reset();
}

uv_loop_ptr::operator uv_loop_t*()
{
  return this->loop.get();
}

uv_loop_t* uv_loop_ptr::operator->() const noexcept
{
  return this->loop.get();
}

uv_loop_t* uv_loop_ptr::get() const
{
  return this->loop.get();
}

template <typename T>
static void handle_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, [](uv_handle_t* h) { free(h); });
    }
  }
}

/**
 * Encapsulates delete logic for a given handle type T
 */
template <typename T>
struct uv_handle_deleter
{
  void operator()(T* type_handle) const { handle_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();
}

#ifndef CMAKE_BOOTSTRAP
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<std::mutex> handleMutex;

  uv_handle_deleter()
    : handleMutex(std::make_shared<std::mutex>())
  {
  }

  void operator()(uv_async_t* handle)
  {
    std::lock_guard<std::mutex> lock(*handleMutex);
    handle_default_delete(handle);
  }
};

void uv_async_ptr::send()
{
  auto deleter = std::get_deleter<uv_handle_deleter<uv_async_t>>(this->handle);
  assert(deleter);

  std::lock_guard<std::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);
}
#endif

template <>
struct uv_handle_deleter<uv_signal_t>
{
  void operator()(uv_signal_t* handle) const
  {
    if (handle) {
      uv_signal_stop(handle);
      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());
}

int uv_process_ptr::spawn(uv_loop_t& loop, uv_process_options_t const& options,
                          void* data)
{
  allocate(data);
  return uv_spawn(&loop, *this, &options);
}

int uv_timer_ptr::init(uv_loop_t& loop, void* data)
{
  allocate(data);
  return uv_timer_init(&loop, *this);
}

int uv_timer_ptr::start(uv_timer_cb cb, uint64_t timeout, uint64_t repeat)
{
  assert(handle);
  return uv_timer_start(*this, cb, timeout, repeat);
}

#ifndef CMAKE_BOOTSTRAP
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);
}
#endif

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(signal)

UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(pipe)

UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(stream)

UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(process)

UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(timer)

#ifndef CMAKE_BOOTSTRAP
UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(async)

UV_HANDLE_PTR_INSTANTIATE_EXPLICIT(tty)
#endif
}