469f0671d1
The systemc dir was not included in this fix.
First it was identified that there were only occurrences
at 0, 1, and 2 levels of indentation, using:
grep -nrE --exclude-dir=systemc \
"^ *class [A-Za-z].* {$" src/
Then the following commands were run to replace:
<indent level>class X ... {
by:
<indent level>class X ...
<indent level>{
Level 0:
grep -nrl --exclude-dir=systemc
"^class [A-Za-z].* {$" src/ | \
xargs sed -Ei \
's/^class ([A-Za-z].*) \{$/class \1\n\{/g'
Level 1:
grep -nrl --exclude-dir=systemc \
"^ class [A-Za-z].* {$" src/ | \
xargs sed -Ei \
's/^ class ([A-Za-z].*) \{$/ class \1\n \{/g'
and so on.
Change-Id: I17615ce16a333d69867b27c7bae0f4fdafd8b2eb
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/39015
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
130 lines
4.3 KiB
C++
130 lines
4.3 KiB
C++
/*
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* Copyright (c) 2017 Advanced Micro Devices, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef __FUTEX_MAP_HH__
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#define __FUTEX_MAP_HH__
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#include <unordered_map>
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#include <unordered_set>
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#include <cpu/thread_context.hh>
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/**
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* FutexKey class defines an unique identifier for a particular futex in the
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* system. The tgid and an address are the unique values needed as the key.
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*/
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class FutexKey
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{
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public:
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uint64_t addr;
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uint64_t tgid;
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FutexKey(uint64_t addr_in, uint64_t tgid_in);
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bool operator==(const FutexKey &in) const;
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};
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namespace std {
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/**
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* The unordered_map structure needs the parenthesis operator defined for
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* std::hash if a user defined key is used. Our key is is user defined
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* so we need to provide the hash functor.
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*/
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template <>
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struct hash<FutexKey>
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{
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size_t operator()(const FutexKey& in) const;
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};
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}
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/**
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* WaiterState defines internal state of a waiter thread. The state
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* includes a pointer to the thread's context and its associated bitmask.
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*/
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class WaiterState
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{
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public:
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ThreadContext* tc;
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int bitmask;
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/**
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* this constructor is used if futex ops with bitset are used
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*/
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WaiterState(ThreadContext* _tc, int _bitmask);
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/**
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* return true if the bit-wise AND of the wakeup_bitmask given by
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* a waking thread and this thread's internal bitmask is non-zero
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*/
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bool checkMask(int wakeup_bitmask) const;
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};
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typedef std::list<WaiterState> WaiterList;
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/**
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* FutexMap class holds a map of all futexes used in the system
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*/
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class FutexMap : public std::unordered_map<FutexKey, WaiterList>
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{
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public:
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/** Inserts a futex into the map with one waiting TC */
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void suspend(Addr addr, uint64_t tgid, ThreadContext *tc);
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/** Wakes up at most count waiting threads on a futex */
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int wakeup(Addr addr, uint64_t tgid, int count);
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void suspend_bitset(Addr addr, uint64_t tgid, ThreadContext *tc,
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int bitmask);
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int wakeup_bitset(Addr addr, uint64_t tgid, int bitmask);
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/**
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* This operation wakes a given number (val) of waiters. If there are
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* more threads waiting than woken, they are removed from the wait
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* queue of the futex pointed to by addr1 and added to the wait queue
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* of the futex pointed to by addr2. The number of waiter moved is
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* capped by count2 (misused timeout parameter).
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*
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* The return value is the number of waiters that are woken or
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* requeued.
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*/
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int requeue(Addr addr1, uint64_t tgid, int count, int count2, Addr addr2);
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/**
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* Determine if the given thread context is currently waiting on a
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* futex wait operation on any of the futexes tracked by this FutexMap.
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*/
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bool is_waiting(ThreadContext *tc);
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private:
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std::unordered_set<ThreadContext *> waitingTcs;
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};
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#endif // __FUTEX_MAP_HH__
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