00001 /* 00002 00003 Copyright (c) 2003, Magnus Jonsson, Arvid Norberg 00004 All rights reserved. 00005 00006 Redistribution and use in source and binary forms, with or without 00007 modification, are permitted provided that the following conditions 00008 are met: 00009 00010 * Redistributions of source code must retain the above copyright 00011 notice, this list of conditions and the following disclaimer. 00012 * Redistributions in binary form must reproduce the above copyright 00013 notice, this list of conditions and the following disclaimer in 00014 the documentation and/or other materials provided with the distribution. 00015 * Neither the name of the author nor the names of its 00016 contributors may be used to endorse or promote products derived 00017 from this software without specific prior written permission. 00018 00019 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 00020 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 00021 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 00022 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 00023 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 00024 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 00025 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 00026 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 00027 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 00028 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 00029 POSSIBILITY OF SUCH DAMAGE. 00030 00031 */ 00032 00033 #ifndef TORRENT_RESOURCE_REQUEST_HPP_INCLUDED 00034 #define TORRENT_RESOURCE_REQUEST_HPP_INCLUDED 00035 00036 #include <boost/integer_traits.hpp> 00037 00038 #ifdef min 00039 #undef min 00040 #endif 00041 00042 #ifdef max 00043 #undef max 00044 #endif 00045 00046 #include "libtorrent/config.hpp" 00047 00048 namespace libtorrent 00049 { 00050 struct TORRENT_EXPORT resource_request 00051 { 00052 resource_request() 00053 : used(0) 00054 , min(0) 00055 , max(0) 00056 , given(0) 00057 , leftovers(0) 00058 {} 00059 00060 resource_request(int used_, int min_, int max_, int given_) 00061 : used(used_) 00062 , min(min_) 00063 , max(max_) 00064 , given(given_) 00065 , leftovers(0) 00066 {} 00067 00068 int left() const 00069 { 00070 assert(given <= max); 00071 assert(given >= min); 00072 assert(used >= 0); 00073 return (std::max)(given - used, 0); 00074 } 00075 00076 void reset() { used = leftovers; leftovers = 0; } 00077 00078 static const int inf = boost::integer_traits<int>::const_max; 00079 00080 // right now I'm actively using this amount 00081 int used; 00082 00083 // given cannot be smaller than min 00084 // and not greater than max. 00085 int min; 00086 int max; 00087 00088 // Reply: Okay, you're allowed to use this amount (a compromise): 00089 int given; 00090 00091 // this is the amount of resources that exceeded the 00092 // given limit. When the used field is reset (after resources 00093 // have been distributed), it is reset to this number. 00094 int leftovers; 00095 }; 00096 } 00097 00098 00099 #endif
1.5.6