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* cygwin.din (pthread_spin_destroy): Export.

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(pthread_spin_init): Export.
	(pthread_spin_lock): Export.
	(pthread_spin_trylock): Export.
	(pthread_spin_unlock): Export.
	* posix.sgml (std-susv4): Add pthread_spin_destroy, pthread_spin_init,
	pthread_spin_lock, pthread_spin_trylock, pthread_spin_unlock.
	(std-notimpl): Remove pthread_spin_[...].
	* pthread.cc (pthread_spin_init): New function.
	* thread.cc (pthread_spinlock::is_good_object): New function.
	(pthread_mutex::pthread_mutex): Rearrange initializers to accommodate
	protected data in pthread_mutex.
	(pthread_spinlock::pthread_spinlock): New constructor.
	(pthread_spinlock::lock): New method.
	(pthread_spinlock::unlock): New method.
	(pthread_spinlock::init): New method.
	(pthread_spin_lock): New function.
	(pthread_spin_trylock): New function.
	(pthread_spin_unlock): New function.
	(pthread_spin_destroy): New function.
	* thread.h (PTHREAD_SPINLOCK_MAGIC): Define.
	(class pthread_mutex): Change access level of members shared with
	derived classes to protected.
	(pthread_mutex::set_shared): New protected method.
	(class pthread_spinlock): New class, derived class of pthread_mutex.
	* include/pthread.h (pthread_spin_destroy): Declare.
	(pthread_spin_init): Declare.
	(pthread_spin_lock): Declare.
	(pthread_spin_trylock): Declare.
	(pthread_spin_unlock): Declare.
	* include/cygwin/types.h (pthread_spinlock_t): New typedef.
	* include/cygwin/version.h (CYGWIN_VERSION_API_MINOR): Bump.
This commit is contained in:
Corinna Vinschen
2011-03-29 10:32:40 +00:00
parent a011f95216
commit f00fe1b8e7
9 changed files with 217 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

29
winsup/cygwin/thread.h
View File

@ -1,7 +1,7 @@
/* thread.h: Locking and threading module definitions
Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007,
2008, 2009, 2010 Red Hat, Inc.
2008, 2009, 2010, 2011 Red Hat, Inc.
This file is part of Cygwin.
@ -98,6 +98,7 @@ class pinfo;
#define PTHREAD_ONCE_MAGIC PTHREAD_MAGIC+8
#define PTHREAD_RWLOCK_MAGIC PTHREAD_MAGIC+9
#define PTHREAD_RWLOCKATTR_MAGIC PTHREAD_MAGIC+10
#define PTHREAD_SPINLOCK_MAGIC PTHREAD_MAGIC+11
#define MUTEX_OWNER_ANONYMOUS ((pthread_t) -1)
@ -303,18 +304,15 @@ public:
mutexes.for_each (&pthread_mutex::_fixup_after_fork);
}
private:
protected:
unsigned long lock_counter;
HANDLE win32_obj_id;
unsigned int recursion_counter;
LONG condwaits;
pthread_t owner;
#ifdef DEBUGGING
DWORD tid; /* the thread id of the owner */
#endif
int type;
int pshared;
void set_shared (int in_shared) { pshared = in_shared; }
void set_owner (pthread_t self)
{
recursion_counter = 1;
@ -323,10 +321,17 @@ private:
tid = GetCurrentThreadId ();
#endif
}
static const pthread_t _new_mutex;
static const pthread_t _unlocked_mutex;
static const pthread_t _destroyed_mutex;
private:
unsigned int recursion_counter;
LONG condwaits;
int type;
int pshared;
bool no_owner ();
void _fixup_after_fork ();
@ -335,6 +340,18 @@ private:
friend class pthread_cond;
};
class pthread_spinlock: public pthread_mutex
{
public:
static bool is_good_object (pthread_spinlock_t const *);
static int init (pthread_spinlock_t *, int);
int lock ();
int unlock ();
pthread_spinlock (int);
};
#define WAIT_CANCELED (WAIT_OBJECT_0 + 1)
#define WAIT_SIGNALED (WAIT_OBJECT_0 + 2)