/usr/include/corelinux/GatewaySemaphore.hpp is in libcorelinux-dev 0.4.32-7.4ubuntu1.
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 | #if !defined(__GATEWAYSEMAPHORE_HPP)
#define __GATEWAYSEMAPHORE_HPP
/*
CoreLinux++
Copyright (C) 1999,2000 CoreLinux Consortium
The CoreLinux++ Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The CoreLinux++ Library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#if !defined(__COMMON_HPP)
#include <Common.hpp>
#endif
#if !defined(__SEMAPHORE_HPP)
#include <Semaphore.hpp>
#endif
#if !defined(__MAP_HPP)
#include <Map.hpp>
#endif
namespace corelinux
{
DECLARE_CLASS( GatewaySemaphore );
CORELINUX_MAP
(
ThreadIdentifier,
Count ,
std::less<ThreadIdentifier>,
GatewayClient
);
/**
GatewaySemphore enables a depth of resource indicator.
Unlike the tradition boolean semaphore (locked,unlocked),
this type assumes a finite number of threads/processes can be
granted access up to theResourceMaximum.
The semantics regarding semaphore and recursion in relationship
to the GatewaySemaphore is as follows:
<p>
With recursion enabled:
<ul>
<li><b>Semaphore::getOwningThreadIdentifier</b> returns the ThreadIdentifier
of the thread that pushed the value to zero(0).
<li><b>Semaphore::getRecursionQueueLength</b> returns the depth of recursion
by <b>Semaphore::getOwningThreadIdentifier</b>
<li><b>GatewaySemaphore::isAnOwner</b> returns true if the current
thread is in the set of threads that own a resource.
<li><b>GatewaySemaphore::getOwnerRecursionQueueLength</b> returns either
-1 if the current thread does not control a resource, 0 if the current thread
does own a resource, but has not recursed, or returns the depth of recursion
for the calling thread.
</ul>
*/
class GatewaySemaphore : public Semaphore
{
public:
//
// Constructors and destructors
//
/**
Default constructor requires the identifier
of the semaphore in the semaphore group and
a count of resources for control
@param SemaphoreGroupPtr The owning SemaphoreGroup
@param SemaphoreIdentifier The identifier
for the Semaphore from the SemaphoreGroup
@param Count number of resources the semaphore
controls
@param bool true if recursion enabled
@param bool true if balking enabled
*/
GatewaySemaphore
(
SemaphoreGroupPtr,
SemaphoreIdentifierRef,
Count ,
bool Recursive = false,
bool Balking = false
) throw ( NullPointerException );
/// Virtual Destructor
virtual ~GatewaySemaphore( void );
//
// Accessors
//
/// Ask if AbstractSemaphore instance is locked
virtual bool isLocked( void );
/// Returns true if calling thread owns a resource
virtual bool isAnOwner( void );
/**
Returns the recursion depth for the calling thread
@return Counter -1 if not an owner, 0 if owner but not
recursed, or > 0 for recursion depth.
*/
virtual Counter getOwnerRecursionQueueLength( void );
//
// Mutators
//
/// Request the lock, wait for availability
virtual SemaphoreOperationStatus lockWithWait(void)
throw( SemaphoreException );
/// Request the lock without waiting
virtual SemaphoreOperationStatus lockWithNoWait(void)
throw( SemaphoreException );
/// Request the AbstractSemaphore but timeout if not available
// virtual SemaphoreOperationStatus lockWithTimeOut( Timer )
// throw(SemaphoreException) = 0;
/// Release the lock
virtual SemaphoreOperationStatus release(void)
throw( SemaphoreException );
protected:
//
// Constructors
//
/// Default construct throws assert
GatewaySemaphore( void ) throw( Assertion );
/// Copy constructor throws assertion
GatewaySemaphore( GatewaySemaphoreCref )
throw( Assertion );
//
// Operator overloads
//
/// Assignment operator throws assertion
GatewaySemaphoreRef operator=( GatewaySemaphoreCref )
throw( Assertion );
//
// Mutators
//
SemaphoreOperationStatus lockAndAdd
(
ThreadIdentifierRef aTid,
Int aFlag = 0
);
private:
/// The maximum count value
Count theMaxCount;
/// Set of threads that hold
GatewayClient theClients;
};
}
#endif // if !defined(__GATEWAYSEMAPHORE_HPP)
/*
Common rcs information do not modify
$Author: prudhomm $
$Revision: 1.4 $
$Date: 2000/08/31 22:52:20 $
$Locker: $
*/
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