| /* |
| * Copyright 2012, 2015 SAP AG. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code 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 General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| |
| #ifndef OS_AIX_VM_MISC_AIX_HPP |
| #define OS_AIX_VM_MISC_AIX_HPP |
| |
| // misc_aix.hpp, misc_aix.cpp: convenience functions needed for the OpenJDK AIX |
| // port. |
| #include "utilities/globalDefinitions.hpp" |
| |
| #include <pthread.h> |
| |
| // Trace if verbose to tty. |
| #define trcVerbose(fmt, ...) { \ |
| if (Verbose) { \ |
| fprintf(stderr, fmt, ##__VA_ARGS__); \ |
| fputc('\n', stderr); fflush(stderr); \ |
| } \ |
| } |
| #define ERRBYE(s) { trcVerbose(s); return -1; } |
| #define trc(fmt, ...) |
| |
| #define assert0(b) assert((b), "") |
| #define guarantee0(b) guarantee((b), "") |
| template <class T1, class T2> bool is_aligned_to(T1 what, T2 alignment) { |
| return (((uintx)(what)) & (((uintx)(alignment)) - 1)) == 0 ? true : false; |
| } |
| |
| // CritSect: simple critical section implementation using pthread mutexes. |
| namespace MiscUtils { |
| typedef pthread_mutex_t critsect_t; |
| |
| void init_critsect(MiscUtils::critsect_t* cs); |
| void free_critsect(MiscUtils::critsect_t* cs); |
| void enter_critsect(MiscUtils::critsect_t* cs); |
| void leave_critsect(MiscUtils::critsect_t* cs); |
| |
| // Need to wrap this in an object because we need to dynamically initialize |
| // critical section (because of windows, where there is no way to initialize |
| // a CRITICAL_SECTION statically. On Unix, we could use |
| // PTHREAD_MUTEX_INITIALIZER). |
| |
| // Note: The critical section does NOT get cleaned up in the destructor. That is |
| // by design: the CritSect class is only ever used as global objects whose |
| // lifetime spans the whole VM life; in that context we don't want the lock to |
| // be cleaned up when global C++ objects are destroyed, but to continue to work |
| // correctly right to the very end of the process life. |
| class CritSect { |
| critsect_t _cs; |
| public: |
| CritSect() { init_critsect(&_cs); } |
| //~CritSect() { free_critsect(&_cs); } |
| void enter() { enter_critsect(&_cs); } |
| void leave() { leave_critsect(&_cs); } |
| }; |
| |
| class AutoCritSect { |
| CritSect* const _pcsobj; |
| public: |
| AutoCritSect(CritSect* pcsobj) |
| : _pcsobj(pcsobj) |
| { |
| _pcsobj->enter(); |
| } |
| ~AutoCritSect() { |
| _pcsobj->leave(); |
| } |
| }; |
| |
| // Returns true if pointer can be dereferenced without triggering a segment |
| // violation. Returns false if pointer is invalid. |
| // Note: Depends on stub routines; prior to stub routine generation, will |
| // always return true. Use CanUseSafeFetch32 to handle this case. |
| bool is_readable_pointer(const void* p); |
| |
| } |
| |
| #endif // OS_AIX_VM_MISC_AIX_HPP |
| |