PriorityPointerPair.h revision 598df88bd6fc33c6fb330bc859bdc277795501f3
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===-- PriorityPointerPair.h ----------------------------------------*- C++ -*-===// 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The LLVM Compiler Infrastructure 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// License. See LICENSE.TXT for details. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef liblldb_PriorityPointerPair_h_ 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define liblldb_PriorityPointerPair_h_ 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 139ab5563a3196760eb381d102cbb2bc0f7abc6a50Ben Murdoch#include "lldb/lldb-public.h" 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "lldb/Utility/SharingPtr.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace lldb_utility { 17868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) 18eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch//---------------------------------------------------------------------- 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// A prioritized pair of SharedPtr<T>. One of the two pointers is high 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// priority, the other is low priority. 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The Get() method always returns high, if *high != NULL, 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// otherwise, low is returned (even if *low == NULL) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//---------------------------------------------------------------------- 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)template<typename T> 26c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles)class PriorityPointerPair 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles){ 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)public: 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef T& reference_type; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef T* pointer_type; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) typedef typename STD_SHARED_PTR(T) T_SP; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PriorityPointerPair() : 362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) m_high(), 372a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) m_low() 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) {} 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PriorityPointerPair(pointer_type high, 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pointer_type low) : 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_high(high), 43b2df76ea8fec9e32f6f3718986dba0d95315b29cTorne (Richard Coles) m_low(low) 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) {} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PriorityPointerPair(pointer_type low) : 47a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) m_high(), 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_low(low) 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) {} 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PriorityPointerPair(T_SP& high, 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T_SP& low) : 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_high(high), 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_low(low) 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) {} 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) PriorityPointerPair(T_SP& low) : 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_high(), 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_low(low) 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) {} 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SwapLow(pointer_type l) 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_low.swap(l); 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SwapHigh(pointer_type h) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_high.swap(h); 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SwapLow(T_SP l) 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_low.swap(l); 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SwapHigh(T_SP h) 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_high.swap(h); 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T_SP 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GetLow() 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return m_low; 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T_SP 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GetHigh() 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return m_high; 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T_SP 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Get() 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (m_high.get()) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return m_high; 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return m_low; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetHigh() 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_high.reset(); 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetLow() 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) m_low.reset(); 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Reset() 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetLow(); 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ResetHigh(); 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) reference_type 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) operator*() const 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Get().operator*(); 1295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) pointer_type 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) operator->() const 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) { 1345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return Get().operator->(); 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ~PriorityPointerPair(); 138a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles) 139a3f6a49ab37290eeeb8db0f41ec0f1cb74a68be7Torne (Richard Coles)private: 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T_SP m_high; 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) T_SP m_low; 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN (PriorityPointerPair); 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1482a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} // namespace lldb_utility 1492a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1502a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#endif // #ifndef liblldb_PriorityPointerPair_h_ 1512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)