FutexMap Class Reference

FutexMap class holds a map of all futexes used in the system. More...

#include <futex_map.hh>

Inheritance diagram for FutexMap:

Public Member Functions
void	suspend (Addr addr, uint64_t tgid, ThreadContext *tc)
	Inserts a futex into the map with one waiting TC. More...
int	wakeup (Addr addr, uint64_t tgid, int count)
	Wakes up at most count waiting threads on a futex. More...
void	suspend_bitset (Addr addr, uint64_t tgid, ThreadContext *tc, int bitmask)
	inserts a futex into the map with one waiting TC associates the waiter with a given bitmask More...
int	wakeup_bitset (Addr addr, uint64_t tgid, int bitmask)
	Wakes up all waiters waiting on the addr and associated with the given bitset. More...
int	requeue (Addr addr1, uint64_t tgid, int count, int count2, Addr addr2)
	This operation wakes a given number (val) of waiters. More...

Detailed Description

FutexMap class holds a map of all futexes used in the system.

Definition at line 121 of file futex_map.hh.

Member Function Documentation

requeue()

int FutexMap::requeue ( Addr  addr1, uint64_t  tgid, int  count, int  count2, Addr  addr2  )

inline

This operation wakes a given number (val) of waiters.

If there are more threads waiting than woken, they are removed from the wait queue of the futex pointed to by addr1 and added to the wait queue of the futex pointed to by addr2. The number of waiter moved is capped by count2 (misused timeout parameter).

The return value is the number of waiters that are woken or requeued.

Definition at line 243 of file futex_map.hh.

References X86ISA::count, ArmISA::it1, ArmISA::it2, and MipsISA::w.

Referenced by futexFunc().

suspend()

void FutexMap::suspend ( Addr  addr, uint64_t  tgid, ThreadContext *  tc  )

inline

Inserts a futex into the map with one waiting TC.

Suspend the thread context

Definition at line 126 of file futex_map.hh.

References ThreadContext::suspend().

Referenced by futexFunc().

suspend_bitset()

void FutexMap::suspend_bitset ( Addr  addr, uint64_t  tgid, ThreadContext *  tc, int  bitmask  )

inline

inserts a futex into the map with one waiting TC associates the waiter with a given bitmask

Suspend the thread context

Definition at line 179 of file futex_map.hh.

References ThreadContext::suspend().

Referenced by futexFunc().

wakeup()

int FutexMap::wakeup ( Addr  addr, uint64_t  tgid, int  count  )

inline

Wakes up at most count waiting threads on a futex.

Definition at line 144 of file futex_map.hh.

References X86ISA::count, and ThreadContext::Suspended.

Referenced by exitFutexWake(), and futexFunc().

wakeup_bitset()

int FutexMap::wakeup_bitset ( Addr  addr, uint64_t  tgid, int  bitmask  )

inline

Wakes up all waiters waiting on the addr and associated with the given bitset.

Definition at line 201 of file futex_map.hh.

References ThreadContext::activate(), WaiterState::checkMask(), and WaiterState::tc.

Referenced by futexFunc().

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The documentation for this class was generated from the following file:

• sim/futex_map.hh