/usr/include/libdap/MarshallerThread.h is in libdap-dev 3.15.1-7.
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 | // -*- mode: c++; c-basic-offset:4 -*-
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
// Copyright (c) 2015 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
/*
* MarshallerThread.h
*
* Created on: Aug 27, 2015
* Author: jimg
*/
#ifndef MARSHALLERTHREAD_H_
#define MARSHALLERTHREAD_H_
#include <pthread.h>
#include <iostream>
#include <ostream>
#include <string>
namespace libdap {
/**
* RAII for the MarshallerThread mutex and condition variable. Used by the
* Main thread. The constructor locks the mutex and then, if the count of
* child threads is not zero, blocks on the associated condition variable.
* When signaled by the child thread using the condition variable (the child
* thread count should then be zero), the mutex is (re)locked and the ctor
* returns. The destructor unlocks the mutex.
*/
class Locker {
public:
Locker(pthread_mutex_t &lock, pthread_cond_t &cond, int &count);
virtual ~Locker();
private:
pthread_mutex_t& m_mutex;
Locker();
Locker(const Locker &rhs);
};
/**
* RAII (for MarshallerThread) used by the child thread. The ctor simply
* locks the mutex; the dtor clears the child thread count, signals that
* count has changed and unlocks the mutex.
*/
class ChildLocker {
public:
ChildLocker(pthread_mutex_t &lock, pthread_cond_t &cond, int &count);
virtual ~ChildLocker();
private:
pthread_mutex_t& m_mutex;
pthread_cond_t& m_cond;
int& m_count;
ChildLocker();
ChildLocker(const Locker &rhs);
};
class MarshallerThread {
private:
pthread_t d_thread;
pthread_attr_t d_thread_attr;
pthread_mutex_t d_out_mutex;
pthread_cond_t d_out_cond;
int d_child_thread_count; // 0 or 1
std::string d_thread_error; // non-null indicates an error
static bool print_time; // false by default
/**
* Used to pass information into the static methods that run the
* simple stream writer threads. This can pass both an ostream or
* a file descriptor. If a fd is passed, the ostream reference is
* set to stderr (i.e., std::cerr).
*/
struct write_args {
pthread_mutex_t &d_mutex;
pthread_cond_t &d_cond;
int &d_count;
std::string &d_error;
std::ostream &d_out; // The output stream protected by the mutex, ...
int d_out_file; // file descriptor; if not -1, use this.
char *d_buf; // The data to write to the stream
int d_num; // The size of d_buf
/**
* Build args for an ostream. The file descriptor is set to -1
*/
write_args(pthread_mutex_t &m, pthread_cond_t &c, int &count, std::string &e, std::ostream &s, char *vals, int num) :
d_mutex(m), d_cond(c), d_count(count), d_error(e), d_out(s), d_out_file(-1), d_buf(vals), d_num(num)
{
}
/**
* Build args for a file descriptr. The ostream is set to cerr (because it is
* a reference and has to be initialized to something).
*/
write_args(pthread_mutex_t &m, pthread_cond_t &c, int &count, std::string &e, int fd, char *vals, int num) :
d_mutex(m), d_cond(c), d_count(count), d_error(e), d_out(std::cerr), d_out_file(fd), d_buf(vals), d_num(num)
{
}
};
public:
MarshallerThread();
virtual ~MarshallerThread();
pthread_mutex_t &get_mutex() { return d_out_mutex; }
pthread_cond_t &get_cond() { return d_out_cond; }
int &get_child_thread_count() { return d_child_thread_count; }
void increment_child_thread_count() { ++d_child_thread_count; }
void start_thread(void* (*thread)(void *arg), std::ostream &out, char *byte_buf, unsigned int bytes_written);
void start_thread(void* (*thread)(void *arg), int fd, char *byte_buf, unsigned int bytes_written);
// These are static so they will have c-linkage - required because they
// are passed to pthread_create()
static void *write_thread(void *arg);
static void *write_thread_part(void *arg);
static void set_print_time(bool state) { print_time = state; }
static bool get_print_time() { return print_time; }
};
}
#endif /* MARSHALLERTHREAD_H_ */
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