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Finish user stack support. Change locking code to be safe in situations with different priorities.

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1998-06-25 19:27  Ulrich Drepper  <drepper@cygnus.com>

	* attr.c: Finish user stack support.  Change locking code to be safe
	in situations with different priorities.
	* cancel.c: Likewise.
	* condvar.c: Likewise.
	* internals.h: Likewise.
	* join.c: Likewise.
	* manager.c: Likewise.
	* mutex.c: Likewise.
	* pthread.c: Likewise.
	* ptlongjmp.c: Likewise.
	* queue.h: Likewise.
	* rwlock.c: Likewise.
	* semaphore.c: Likewise.
	* semaphore.h: Likewise.
	* signals.c: Likewise.
	* spinlock.c: Likewise.
	* spinlock.h: Likewise.
	Patches by Xavier leroy.

1998-06-25  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/pthread/pthread.h: Make [sg]et_stacksize and
	[sg]et_stackaddr prototypes always available.

	* sysdeps/unix/sysv/linux/bits/posix_opt.h: Define
	_POSIX_THREAD_ATTR_STACKSIZE and _POSIX_THREAD_ATTR_STACKADDR.
This commit is contained in:
Ulrich Drepper
1998-06-25 19:36:00 +00:00
parent d47aac3999
commit 3387a425e6
23 changed files with 633 additions and 512 deletions
Download Patch File Download Diff File Expand all files Collapse all files

38
linuxthreads/sysdeps/pthread/pthread.h
View File

@ -43,21 +43,24 @@ typedef unsigned long int pthread_t;
/* Thread descriptors */
typedef struct _pthread_descr_struct *_pthread_descr;
/* Waiting queues (not abstract because mutexes and conditions aren't). */
struct _pthread_queue
/* Fast locks (not abstract because mutexes and conditions aren't abstract). */
struct _pthread_fastlock
{
_pthread_descr head; /* First element, or NULL if queue empty. */
_pthread_descr tail; /* Last element, or NULL if queue empty. */
long status; /* "Free" or "taken" or head of waiting list */
int spinlock; /* For compare-and-swap emulation */
};
/* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */
/* (The layout is unnatural to maintain binary compatibility
with earlier releases of LinuxThreads.) */
typedef struct
{
int m_spinlock; /* Spin lock to guarantee mutual exclusion. */
int m_count; /* 0 if free, > 0 if taken. */
_pthread_descr m_owner; /* Owner of mutex (for recursive mutexes) */
int m_kind; /* Kind of mutex */
struct _pthread_queue m_waiting; /* Threads waiting on this mutex. */
int m_reserved; /* Reserved for future use */
int m_count; /* Depth of recursive locking */
_pthread_descr m_owner; /* Owner thread (if recursive or errcheck) */
int m_kind; /* Mutex kind: fast, recursive or errcheck */
struct _pthread_fastlock m_lock; /* Underlying fast lock */
} pthread_mutex_t;
#define PTHREAD_MUTEX_INITIALIZER \
@ -68,21 +71,21 @@ typedef struct
/* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */
typedef struct
{
int c_spinlock; /* Spin lock to protect the queue. */
struct _pthread_queue c_waiting; /* Threads waiting on this condition. */
struct _pthread_fastlock c_lock; /* Protect against concurrent access */
_pthread_descr c_waiting; /* Threads waiting on this condition */
} pthread_cond_t;
#define PTHREAD_COND_INITIALIZER {0, {0, 0}}
#define PTHREAD_COND_INITIALIZER {{0, 0}, 0}
#ifdef __USE_UNIX98
/* Read-write locks. */
typedef struct
{
int rw_spinlock; /* Spin lock to guarantee mutual exclusion */
struct _pthread_fastlock rw_lock; /* Lock to guarantee mutual exclusion */
int rw_readers; /* Number of readers */
_pthread_descr rw_writer; /* Identity of writer, or NULL if none */
struct _pthread_queue rw_read_waiting; /* Threads waiting for reading */
struct _pthread_queue rw_write_waiting; /* Threads waiting for writing */
_pthread_descr rw_read_waiting; /* Threads waiting for reading */
_pthread_descr rw_write_waiting; /* Threads waiting for writing */
int rw_kind; /* Reader/Writer preference selection */
int rw_pshared; /* Shared between processes or not */
} pthread_rwlock_t;
@ -231,7 +234,8 @@ extern int pthread_detach __P ((pthread_t __th));
/* Functions for handling attributes. */
/* Initialize thread attribute *ATTR with default attributes
(detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER). */
(detachstate is PTHREAD_JOINABLE, scheduling policy is SCHED_OTHER,
no user-provided stack). */
extern int pthread_attr_init __P ((pthread_attr_t *__attr));
/* Destroy thread attribute *ATTR. */
@ -288,6 +292,7 @@ extern int __pthread_attr_getguardsize __P ((__const pthread_attr_t *__attr,
size_t *__guardsize));
extern int pthread_attr_getguardsize __P ((__const pthread_attr_t *__attr,
size_t *__guardsize));
#endif
/* Set the starting address of the stack of the thread to be created.
Depending on whether the stack grows up or doen the value must either
@ -317,7 +322,6 @@ extern int __pthread_attr_getstacksize __P ((__const pthread_attr_t *__attr,
size_t *__stacksize));
extern int pthread_attr_getstacksize __P ((__const pthread_attr_t *__attr,
size_t *__stacksize));
#endif
/* Functions for scheduling control. */