This file is indexed.

/usr/include/asio/impl/spawn.hpp is in libasio-dev 1:1.10.6-3.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  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
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
//
// impl/spawn.hpp
// ~~~~~~~~~~~~~~
//
// Copyright (c) 2003-2015 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//

#ifndef ASIO_IMPL_SPAWN_HPP
#define ASIO_IMPL_SPAWN_HPP

#if defined(_MSC_VER) && (_MSC_VER >= 1200)
# pragma once
#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)

#include "asio/detail/config.hpp"
#include "asio/async_result.hpp"
#include "asio/detail/atomic_count.hpp"
#include "asio/detail/handler_alloc_helpers.hpp"
#include "asio/detail/handler_cont_helpers.hpp"
#include "asio/detail/handler_invoke_helpers.hpp"
#include "asio/detail/noncopyable.hpp"
#include "asio/detail/shared_ptr.hpp"
#include "asio/handler_type.hpp"

#include "asio/detail/push_options.hpp"

namespace asio {
namespace detail {

  template <typename Handler, typename T>
  class coro_handler
  {
  public:
    coro_handler(basic_yield_context<Handler> ctx)
      : coro_(ctx.coro_.lock()),
        ca_(ctx.ca_),
        handler_(ctx.handler_),
        ready_(0),
        ec_(ctx.ec_),
        value_(0)
    {
    }

    void operator()(T value)
    {
      *ec_ = asio::error_code();
      *value_ = ASIO_MOVE_CAST(T)(value);
      if (--*ready_ == 0)
        (*coro_)();
    }

    void operator()(asio::error_code ec, T value)
    {
      *ec_ = ec;
      *value_ = ASIO_MOVE_CAST(T)(value);
      if (--*ready_ == 0)
        (*coro_)();
    }

  //private:
    shared_ptr<typename basic_yield_context<Handler>::callee_type> coro_;
    typename basic_yield_context<Handler>::caller_type& ca_;
    Handler& handler_;
    atomic_count* ready_;
    asio::error_code* ec_;
    T* value_;
  };

  template <typename Handler>
  class coro_handler<Handler, void>
  {
  public:
    coro_handler(basic_yield_context<Handler> ctx)
      : coro_(ctx.coro_.lock()),
        ca_(ctx.ca_),
        handler_(ctx.handler_),
        ready_(0),
        ec_(ctx.ec_)
    {
    }

    void operator()()
    {
      *ec_ = asio::error_code();
      if (--*ready_ == 0)
        (*coro_)();
    }

    void operator()(asio::error_code ec)
    {
      *ec_ = ec;
      if (--*ready_ == 0)
        (*coro_)();
    }

  //private:
    shared_ptr<typename basic_yield_context<Handler>::callee_type> coro_;
    typename basic_yield_context<Handler>::caller_type& ca_;
    Handler& handler_;
    atomic_count* ready_;
    asio::error_code* ec_;
  };

  template <typename Handler, typename T>
  inline void* asio_handler_allocate(std::size_t size,
      coro_handler<Handler, T>* this_handler)
  {
    return asio_handler_alloc_helpers::allocate(
        size, this_handler->handler_);
  }

  template <typename Handler, typename T>
  inline void asio_handler_deallocate(void* pointer, std::size_t size,
      coro_handler<Handler, T>* this_handler)
  {
    asio_handler_alloc_helpers::deallocate(
        pointer, size, this_handler->handler_);
  }

  template <typename Handler, typename T>
  inline bool asio_handler_is_continuation(coro_handler<Handler, T>*)
  {
    return true;
  }

  template <typename Function, typename Handler, typename T>
  inline void asio_handler_invoke(Function& function,
      coro_handler<Handler, T>* this_handler)
  {
    asio_handler_invoke_helpers::invoke(
        function, this_handler->handler_);
  }

  template <typename Function, typename Handler, typename T>
  inline void asio_handler_invoke(const Function& function,
      coro_handler<Handler, T>* this_handler)
  {
    asio_handler_invoke_helpers::invoke(
        function, this_handler->handler_);
  }

} // namespace detail

#if !defined(GENERATING_DOCUMENTATION)

template <typename Handler, typename ReturnType>
struct handler_type<basic_yield_context<Handler>, ReturnType()>
{
  typedef detail::coro_handler<Handler, void> type;
};

template <typename Handler, typename ReturnType, typename Arg1>
struct handler_type<basic_yield_context<Handler>, ReturnType(Arg1)>
{
  typedef detail::coro_handler<Handler, Arg1> type;
};

template <typename Handler, typename ReturnType>
struct handler_type<basic_yield_context<Handler>,
    ReturnType(asio::error_code)>
{
  typedef detail::coro_handler<Handler, void> type;
};

template <typename Handler, typename ReturnType, typename Arg2>
struct handler_type<basic_yield_context<Handler>,
    ReturnType(asio::error_code, Arg2)>
{
  typedef detail::coro_handler<Handler, Arg2> type;
};

template <typename Handler, typename T>
class async_result<detail::coro_handler<Handler, T> >
{
public:
  typedef T type;

  explicit async_result(detail::coro_handler<Handler, T>& h)
    : handler_(h),
      ca_(h.ca_),
      ready_(2)
  {
    h.ready_ = &ready_;
    out_ec_ = h.ec_;
    if (!out_ec_) h.ec_ = &ec_;
    h.value_ = &value_;
  }

  type get()
  {
    handler_.coro_.reset(); // Must not hold shared_ptr to coro while suspended.
    if (--ready_ != 0)
      ca_();
    if (!out_ec_ && ec_) throw asio::system_error(ec_);
    return ASIO_MOVE_CAST(type)(value_);
  }

private:
  detail::coro_handler<Handler, T>& handler_;
  typename basic_yield_context<Handler>::caller_type& ca_;
  detail::atomic_count ready_;
  asio::error_code* out_ec_;
  asio::error_code ec_;
  type value_;
};

template <typename Handler>
class async_result<detail::coro_handler<Handler, void> >
{
public:
  typedef void type;

  explicit async_result(detail::coro_handler<Handler, void>& h)
    : handler_(h),
      ca_(h.ca_),
      ready_(2)
  {
    h.ready_ = &ready_;
    out_ec_ = h.ec_;
    if (!out_ec_) h.ec_ = &ec_;
  }

  void get()
  {
    handler_.coro_.reset(); // Must not hold shared_ptr to coro while suspended.
    if (--ready_ != 0)
      ca_();
    if (!out_ec_ && ec_) throw asio::system_error(ec_);
  }

private:
  detail::coro_handler<Handler, void>& handler_;
  typename basic_yield_context<Handler>::caller_type& ca_;
  detail::atomic_count ready_;
  asio::error_code* out_ec_;
  asio::error_code ec_;
};

namespace detail {

  template <typename Handler, typename Function>
  struct spawn_data : private noncopyable
  {
    spawn_data(ASIO_MOVE_ARG(Handler) handler,
        bool call_handler, ASIO_MOVE_ARG(Function) function)
      : handler_(ASIO_MOVE_CAST(Handler)(handler)),
        call_handler_(call_handler),
        function_(ASIO_MOVE_CAST(Function)(function))
    {
    }

    weak_ptr<typename basic_yield_context<Handler>::callee_type> coro_;
    Handler handler_;
    bool call_handler_;
    Function function_;
  };

  template <typename Handler, typename Function>
  struct coro_entry_point
  {
    void operator()(typename basic_yield_context<Handler>::caller_type& ca)
    {
      shared_ptr<spawn_data<Handler, Function> > data(data_);
#if !defined(BOOST_COROUTINES_UNIDIRECT) && !defined(BOOST_COROUTINES_V2)
      ca(); // Yield until coroutine pointer has been initialised.
#endif // !defined(BOOST_COROUTINES_UNIDIRECT) && !defined(BOOST_COROUTINES_V2)
      const basic_yield_context<Handler> yield(
          data->coro_, ca, data->handler_);
      (data->function_)(yield);
      if (data->call_handler_)
        (data->handler_)();
    }

    shared_ptr<spawn_data<Handler, Function> > data_;
  };

  template <typename Handler, typename Function>
  struct spawn_helper
  {
    void operator()()
    {
      typedef typename basic_yield_context<Handler>::callee_type callee_type;
      coro_entry_point<Handler, Function> entry_point = { data_ };
      shared_ptr<callee_type> coro(new callee_type(entry_point, attributes_));
      data_->coro_ = coro;
      (*coro)();
    }

    shared_ptr<spawn_data<Handler, Function> > data_;
    boost::coroutines::attributes attributes_;
  };

  inline void default_spawn_handler() {}

} // namespace detail

template <typename Handler, typename Function>
void spawn(ASIO_MOVE_ARG(Handler) handler,
    ASIO_MOVE_ARG(Function) function,
    const boost::coroutines::attributes& attributes)
{
  detail::spawn_helper<Handler, Function> helper;
  helper.data_.reset(
      new detail::spawn_data<Handler, Function>(
        ASIO_MOVE_CAST(Handler)(handler), true,
        ASIO_MOVE_CAST(Function)(function)));
  helper.attributes_ = attributes;
  asio_handler_invoke_helpers::invoke(helper, helper.data_->handler_);
}

template <typename Handler, typename Function>
void spawn(basic_yield_context<Handler> ctx,
    ASIO_MOVE_ARG(Function) function,
    const boost::coroutines::attributes& attributes)
{
  Handler handler(ctx.handler_); // Explicit copy that might be moved from.
  detail::spawn_helper<Handler, Function> helper;
  helper.data_.reset(
      new detail::spawn_data<Handler, Function>(
        ASIO_MOVE_CAST(Handler)(handler), false,
        ASIO_MOVE_CAST(Function)(function)));
  helper.attributes_ = attributes;
  asio_handler_invoke_helpers::invoke(helper, helper.data_->handler_);
}

template <typename Function>
void spawn(asio::io_service::strand strand,
    ASIO_MOVE_ARG(Function) function,
    const boost::coroutines::attributes& attributes)
{
  asio::spawn(strand.wrap(&detail::default_spawn_handler),
      ASIO_MOVE_CAST(Function)(function), attributes);
}

template <typename Function>
void spawn(asio::io_service& io_service,
    ASIO_MOVE_ARG(Function) function,
    const boost::coroutines::attributes& attributes)
{
  asio::spawn(asio::io_service::strand(io_service),
      ASIO_MOVE_CAST(Function)(function), attributes);
}

#endif // !defined(GENERATING_DOCUMENTATION)

} // namespace asio

#include "asio/detail/pop_options.hpp"

#endif // ASIO_IMPL_SPAWN_HPP