LinuxThreads library.

1998-03-11 00:42  Wolfram Gloger  <wmglo@dent.med.uni-muenchen.de>
	* linuxthreads/manager.c: Enable resetting of the thread
	scheduling policy to SCHED_OTHER when the parent thread
	has a different one.
1998-02-01 13:51  Ulrich Drepper  <drepper@cygnus.com>
	* sysdeps/unix/sysv/linux/bits/posix_opt.h: Define
	_POSIX_ASYNCHRONOUS_IO.
	* sysdeps/pthread/pthread.h: Define bits for Unix98 variants of
	mutexes.
	* mutex.c: Implement new mutex types.
	* internals.h: Include <signal.h>.
	* libpthread.map: Add __erno_location and __h_errno_location.
	* errno.c: Return pointer to variable actually in use.  This might
	not be the one in the thread structure.
	* internals.h (struct _pthread_descr_struct): Add new fields p_errnop
	and p_h_errnop.
	* manager.c (__pthread_manager): Set p_errnop and p_h_errnop member
	of manager thread structure.
	(pthread_handle_create): Set p_errnop and p_h_errnop members for new
	thread.
	* pthread.c: Adapt initializer for thread structures.
	(__pthread_initial_thread): Set p_errnop and p_h_errnop member.
	(__pthread_reset_main_thread): Reset p_errnop and p_h_errnop of
	current thread to global variables.
1998-01-31 17:27  Ulrich Drepper  <drepper@cygnus.com>
	* rwlock.c: New file.
	* Makefile (libpthread-routines): Add rwlock.
	* sysdeps/pthread/pthread.h: Define data structures and declare
	functions.
	* libpthread.map: Add new functions.
1997-12-18 13:50  Philip Blundell  <pb@nexus.co.uk>
	* sysdeps/arm/pt-machine.h: New file; add ARM support.
	* sysdeps/arm/Implies: likewise.
	* README: Document it.
1997-12-13  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* signals.c: Remove unneeded initializer for sigwaited, saving a
1997-04-11 01:18  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>
	* semaphore.c (sem_init): Set sem_spinlock only if available.
1997-12-04 01:48  Ulrich Drepper  <drepper@cygnus.com>
	* mutex.c: Implement PTHREAD_MUTEX_CHECKERROR.
	* sysdeps/pthread/pthread.h: Define PTHREAD_MUTEX_CHECKERROR.
	* Makefile: Update from LinuxThreads 0.7.
	* internals.h. Likewise.
	* manager.c: Likewise.
	* mutex.c: Likewise.
	* pthread.c: Likewise.
	* signals.c: Likewise.
	* specific.c: Likewise.
	* Examples/ex3.c: Likewise.
1997-11-20 18:13  Ulrich Drepper  <drepper@cygnus.com>
	* pthread.c (__pthread_reset_main_thread): Close pipe only if still
	open.
1997-10-29 05:38  Ulrich Drepper  <drepper@cygnus.com>

	* wrapsyscall.c: Add socket functions which are also cancelation
	points.

1997-10-19 21:40  Wolfram Gloger  <wg@wolfram.dent.med.uni-muenchen.de>

	* specific.c (__libc_internal_tsd_set, __libc_internal_tsd_get):
	New functions for fast thread specific data within libc.

	* internals.h: Add new array p_libc_specific to struct
	_pthread_descr_struct.

	* sysdeps/pthread/bits/libc-lock.h: Declare new functions.

1997-10-13 05:39  Ulrich Drepper  <drepper@cygnus.com>

	* semaphore.h: Add __BEGIN_DECLS/__END_DECLS.
	Reported by Ralf Corsepius <corsepiu@faw.uni-ulm.de>.

1997-08-29 03:05  Ulrich Drepper  <drepper@cygnus.com>

	* internals.h (struct _pthread_descr_struct): Add definitions for
	two-level specific key handling.
	* manager.c (pthread_handle_create): Initialize specific memory array.
	* specific.c: Implement two-level key handling.
	* weaks.c: Don't provide dummy key handling.
	* sysdeps/pthread/bits/libc-lock.h: Typedef __libc_lock_t (no #define).
	Add definition of __libc_key_t.
	* sysdeps/unix/sysv/linux/bits/local_lim.h: Define PTHREAD_KEYS_MAX
	as 1024.
	Add definition of _POSIX_THREAD_DESTRUCTOR_ITERATIONS and
	PTHREAD_DESTRUCTOR_ITERATIONS.

	* manager.c (pthread_handle_create): Compare mmap result with
	MAP_FAILED.

	* ptfork.c: Rename to __pthread_atfork and make old name a weak alias.
	* sysdeps/pthread/bits/pthread.h: Add prototype for __pthread_atfork.

1997-08-22 19:04  Richard Henderson  <rth@cygnus.com>

	sysdeps/sparc -> sysdeps/sparc/sparc32
	sysdeps/sparc64 -> sysdeps/sparc/sparc64

	* internals.h: Change definition of THREAD_SELF to be an expression,
	not a statement that did a return.
	* sysdeps/alpha/pt-machine.h (THREAD_SELF): Update accordingly.
	* sysdeps/sparc/sparc32/pt-machine.h (THREAD_SELF, INIT_THREAD_SELF):
	Follow Solaris and use a "system reserved" register (%g6) to hold
	the thread descriptor.
	* sysdeps/sparc/sparc64/pt-machine.h: Likewise.

1997-08-03 00:09  Ulrich Drepper  <drepper@cygnus.com>

	* mutex.c: Correct pthread_once.  Patch by Xavier Leroy.
	* sysdeps/pthread/pthread.h: Add prototype for __pthread_once.
	* sysdeps/pthread/bits/pthread.h: Add macros for __libc_once.

	* semaphore.c: Include spinlock.h only when needed.

	* specific.c (__pthread_setsepcific, __pthread_getspecific): Reject
	keys for entries not in use.

	* weaks.c: Implement key handling functions for real.

1997-06-29  01:04  Richard Henderson  <richard@gnu.ai.mit.edu>

	Initial sparc64-linux support:
	* linuxthreads/sysdeps/sparc64/Implies: New file.
	* linuxthreads/sysdeps/sparc64/pt-machine.h: Likewise.

1997-06-29 00:48  Ulrich Drepper  <drepper@cygnus.com>

	* semaphore.c: Include spinlock.h at correct place.
	Patch by HJ Lu.

1997-06-13 10:06  Richard Henderson  <rth@tamu.edu>

	The Great Bit File Move:
	* sysdeps/alpha/semaphorebits.h: -> .../bits/semaphore.h.
	* sysdeps/powerpc/semaphorebits.h: Likewise.
	* sysdeps/pthread/cmpxchg/semaphorebits.h: Likewise.
	* sysdeps/pthread/no-cmpxchg/semaphorebits.h: Likewise.
	* sysdeps/pthread/libc-lock.h: -> bits/
	* sysdeps/pthread/stdio-lock.h: Likewise.
	* sysdeps/unix/sysv/linux/local_lim.h: Likewise.
	* sysdeps/unix/sysv/linux/posix_opt.h: Likewise.
	* semaphore.h: Likewise.
	* sysdeps/pthread/pthread.h: Likewise.

	* lockfile.c: <foo.h> -> <bits/foo.h>.
	* semaphore.h: Likewise.

	* Makefile: (headers): foo.h -> bits/foo.h.
	* sysdeps/pthread/Makefile: Likewise.

1997-04-11 01:18  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* semaphore.c (sem_init): Set sem_spinlock only if available.

	* sysdeps/m68k/pt-machine.h (testandset, __compare_and_swap): Fix
	asm constraints.

1997-04-09 03:00  Ulrich Drepper  <drepper@cygnus.com>

	Update from LinuxThreads 0.6.

	* attr.c (pthread_attr_getdetachstate): Use __sched_get_priority_max
	and __sched_get_priority_min instead of names without `__'.

	* manager.c: Rewrite large parts to implement opaque pthread_t.

	* cancel.c: Adapt for opaque pthread_t type.
	* condvar.c: Likewise.
	* errno.c: Likewise.
	* join.c: Likewise.
	* mutex.c: Likewise.
	* pthread.c: Likewise.
	* signals.c: Likewise.
	* specific.c: Likewise.
	* restart.h: Likewise.
	* queue.h: Likewise.
	* Examples/ex3.c: Likewise.
	* Examples/ex4.c: Likewise.
	* sysdeps/pthread/pthread.h: Likewise.

	* pthread.c: Accumulate time for all threads in thread manager.

	* semaphore.c: Implement fallback implementation for architectures
	sometimes missing compare-exchange operations.

	* cancel.c (pthread_cancel): Validate handle argument.
	* join.c (pthread_join): Likewise.
	(pthread_detach): Likewise.
	* signals.c (pthread_kill): Likewise.

	* spinlock.h (acquire): Use __sched_yield not sched_yield.

	* queue.h (enqueue): Enqueue thread according to priority.

	* internals.c (struct pthread_start_args): New struct for passing
	args to cloning function.
	(struct _pthread): Rename to _pthread_descr_struct and adapt for
	opaque pthread_t.

	* Examples/Makefile (clean): Pass -f option to rm.

	* sysdeps/i386/pt-machine.h: Add check for compare-exchange instruction
	and define TEST_FOR_COMPARE_AND_SWAP.
	* sysdeps/i386/i486/pt-machine.h: Removed.

	* sysdeps/unix/sysv/linux/local_lim.h (PTHREAD_THREADS_MAX): Increase
	to 1024.

1997-04-04 16:38  Ulrich Drepper  <drepper@cygnus.com>

	* restart.h (suspend): Clear p_signal before suspending.
	(suspend_with_cancellation): Likewise.
	Patch by Xavier Leroy <Xavier.Leroy@inria.fr>.

	* weaks.c: Make __pthread_key_create return 1.
	* sysdeps/pthread/libc-lock.h: Define __libc_key_create,
	__libc_getspecific, __libc_setspecific, and __libc_key_t.
	* sysdeps/pthread/stdio-lock.h: Don't care for implementation not
	using libio.

1997-03-19 15:13  Miguel de Icaza  <miguel@nuclecu.unam.mx>

	* sysdeps/sparc/pt-machine (RELEASE): Fix.

1997-03-01 07:55  Geoff Keating  <geoffk@ozemail.com.au>

	* sysdeps/powerpc/Implies: Added.
	* sysdeps/powerpc/pt-machine.h: Added.
	* sysdeps/powerpc/semaphorebits.h: Added.

1997-01-22 01:22  Ulrich Drepper  <drepper@cygnus.com>

	* linuxtheads/pthread.c (__pthread_initial_thread): Correct
	initializer.
	(__pthread_manager_thread): Likewise.
	Reported by Andreas Jaeger.

1997-01-18 22:15  Richard Henderson  <rth@tamu.edu>

	Since sigset_t no longer fits in a register, we can't pass in the
	thread's initial mask so easily.  Take this opportunity to simplify
	the clone implementation by only accepting a single void* argument.

	* linuxthreads/manager.c (__pthread_manager): Put thread vitals
	in the thread struct instead of as arguments through clone.
	(pthread_start_thread): Look for them there.
	* linuxthreads/internals.h (struct _pthread): Add p_initial_fn,
	p_initial_fn_arg, p_initial_mask.  Fix __pthread_manager proto.
	* linuxthreads/pthread.c (pthread_initialize_manager): Revise
	clone invocation.

1 files changed, 280 insertions, 0 deletions

diff --git a/linuxthreads/internals.h b/linuxthreads/internals.h
new file mode 100644
index 0000000000..7939605cfe
--- /dev/null
+++ b/linuxthreads/internals.h
@@ -0,0 +1,280 @@
+/* Linuxthreads - a simple clone()-based implementation of Posix        */
+/* threads for Linux.                                                   */
+/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr)              */
+/*                                                                      */
+/* This program is free software; you can redistribute it and/or        */
+/* modify it under the terms of the GNU Library General Public License  */
+/* as published by the Free Software Foundation; either version 2       */
+/* of the License, or (at your option) any later version.               */
+/*                                                                      */
+/* This program 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 Library General Public License for more details.                 */
+
+/* Internal data structures */
+
+/* Includes */
+
+#include <bits/libc-lock.h> /* for _LIBC_TSD_KEY_N */
+#include <setjmp.h>
+#include <signal.h>
+#include <unistd.h>
+#include <sys/types.h>
+
+#include "pt-machine.h"
+
+/* Arguments passed to thread creation routine */
+
+struct pthread_start_args {
+  void * (*start_routine)(void *); /* function to run */
+  void * arg;                   /* its argument */
+  sigset_t mask;                /* initial signal mask for thread */
+  int schedpolicy;              /* initial scheduling policy (if any) */
+  struct sched_param schedparam; /* initial scheduling parameters (if any) */
+};
+
+
+/* We keep thread specific data in a special data structure, a two-level
+   array.  The top-level array contains pointers to dynamically allocated
+   arrays of a certain number of data pointers.  So we can implement a
+   sparse array.  Each dynamic second-level array has
+	PTHREAD_KEY_2NDLEVEL_SIZE
+   entries.  This value shouldn't be too large.  */
+#define PTHREAD_KEY_2NDLEVEL_SIZE	32
+
+/* We need to address PTHREAD_KEYS_MAX key with PTHREAD_KEY_2NDLEVEL_SIZE
+   keys in each subarray.  */
+#define PTHREAD_KEY_1STLEVEL_SIZE \
+  ((PTHREAD_KEYS_MAX + PTHREAD_KEY_2NDLEVEL_SIZE - 1) \
+   / PTHREAD_KEY_2NDLEVEL_SIZE)
+
+
+#define PTHREAD_START_ARGS_INITIALIZER { NULL, NULL, {{0, }}, 0, { 0 } }
+
+/* The type of thread descriptors */
+
+typedef struct _pthread_descr_struct * pthread_descr;
+
+struct _pthread_descr_struct {
+  pthread_descr p_nextlive, p_prevlive;
+                                /* Double chaining of active threads */
+  pthread_descr p_nextwaiting;  /* Next element in the queue holding the thr */
+  pthread_t p_tid;              /* Thread identifier */
+  int p_pid;                    /* PID of Unix process */
+  int p_priority;               /* Thread priority (== 0 if not realtime) */
+  int * p_spinlock;             /* Spinlock for synchronized accesses */
+  int p_signal;                 /* last signal received */
+  sigjmp_buf * p_signal_jmp;    /* where to siglongjmp on a signal or NULL */
+  sigjmp_buf * p_cancel_jmp;    /* where to siglongjmp on a cancel or NULL */
+  char p_terminated;            /* true if terminated e.g. by pthread_exit */
+  char p_detached;              /* true if detached */
+  char p_exited;                /* true if the assoc. process terminated */
+  void * p_retval;              /* placeholder for return value */
+  int p_retcode;                /* placeholder for return code */
+  pthread_descr p_joining;      /* thread joining on that thread or NULL */
+  struct _pthread_cleanup_buffer * p_cleanup; /* cleanup functions */
+  char p_cancelstate;           /* cancellation state */
+  char p_canceltype;            /* cancellation type (deferred/async) */
+  char p_canceled;              /* cancellation request pending */
+  int * p_errnop;               /* pointer to used errno variable */
+  int p_errno;                  /* error returned by last system call */
+  int * p_h_errnop;             /* pointer to used h_errno variable */
+  int p_h_errno;                /* error returned by last netdb function */
+  struct pthread_start_args p_start_args; /* arguments for thread creation */
+  void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE]; /* thread-specific data */
+  void * p_libc_specific[_LIBC_TSD_KEY_N]; /* thread-specific data for libc */
+};
+
+/* The type of thread handles. */
+
+typedef struct pthread_handle_struct * pthread_handle;
+
+struct pthread_handle_struct {
+  int h_spinlock;               /* Spinlock for sychronized access */
+  pthread_descr h_descr;        /* Thread descriptor or NULL if invalid */
+};
+
+/* The type of messages sent to the thread manager thread */
+
+struct pthread_request {
+  pthread_descr req_thread;     /* Thread doing the request */
+  enum {                        /* Request kind */
+    REQ_CREATE, REQ_FREE, REQ_PROCESS_EXIT, REQ_MAIN_THREAD_EXIT
+  } req_kind;
+  union {                       /* Arguments for request */
+    struct {                    /* For REQ_CREATE: */
+      const pthread_attr_t * attr; /* thread attributes */
+      void * (*fn)(void *);     /*   start function */
+      void * arg;               /*   argument to start function */
+      sigset_t mask;            /*   signal mask */
+    } create;
+    struct {                    /* For REQ_FREE: */
+      pthread_descr thread;     /*   descriptor of thread to free */
+    } free;
+    struct {                    /* For REQ_PROCESS_EXIT: */
+      int code;                 /*   exit status */
+    } exit;
+  } req_args;
+};
+
+
+/* Signals used for suspend/restart and for cancellation notification.  */
+
+#ifdef SIGRTMIN
+/* The have real-time signals.  */
+extern int __pthread_sig_restart;
+extern int __pthread_sig_cancel;
+# define PTHREAD_SIG_RESTART __pthread_sig_restart
+# define PTHREAD_SIG_CANCEL __pthread_sig_cancel
+#else
+# define PTHREAD_SIG_RESTART SIGUSR1
+# define PTHREAD_SIG_CANCEL SIGUSR2
+#endif
+
+/* Global array of thread handles, used for validating a thread id
+   and retrieving the corresponding thread descriptor. Also used for
+   mapping the available stack segments. */
+
+extern struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX];
+
+/* Descriptor of the initial thread */
+
+extern struct _pthread_descr_struct __pthread_initial_thread;
+
+/* Descriptor of the manager thread */
+
+extern struct _pthread_descr_struct __pthread_manager_thread;
+
+/* Descriptor of the main thread */
+
+extern pthread_descr __pthread_main_thread;
+
+/* Limit between the stack of the initial thread (above) and the
+   stacks of other threads (below). Aligned on a STACK_SIZE boundary.
+   Initially 0, meaning that the current thread is (by definition)
+   the initial thread. */
+
+extern char *__pthread_initial_thread_bos;
+
+/* File descriptor for sending requests to the thread manager.
+   Initially -1, meaning that pthread_initialize must be called. */
+
+extern int __pthread_manager_request;
+
+/* Other end of the pipe for sending requests to the thread manager. */
+
+extern int __pthread_manager_reader;
+
+/* Limits of the thread manager stack. */
+
+extern char *__pthread_manager_thread_bos;
+extern char *__pthread_manager_thread_tos;
+
+/* Pending request for a process-wide exit */
+
+extern int __pthread_exit_requested, __pthread_exit_code;
+
+/* Return the handle corresponding to a thread id */
+
+static inline pthread_handle thread_handle(pthread_t id)
+{
+  return &__pthread_handles[id % PTHREAD_THREADS_MAX];
+}
+
+/* Validate a thread handle. Must have acquired h->h_spinlock before. */
+
+static inline int invalid_handle(pthread_handle h, pthread_t id)
+{
+  return h->h_descr == NULL || h->h_descr->p_tid != id;
+}
+
+/* Fill in defaults left unspecified by pt-machine.h.  */
+
+/* The page size we can get from the system.  This should likely not be
+   changed by the machine file but, you never know.  */
+#ifndef PAGE_SIZE
+#define PAGE_SIZE  (sysconf (_SC_PAGE_SIZE))
+#endif
+
+/* The max size of the thread stack segments.  If the default
+   THREAD_SELF implementation is used, this must be a power of two and
+   a multiple of PAGE_SIZE.  */
+#ifndef STACK_SIZE
+#define STACK_SIZE  (2 * 1024 * 1024)
+#endif
+
+/* The initial size of the thread stack.  Must be a multiple of PAGE_SIZE.  */
+#ifndef INITIAL_STACK_SIZE
+#define INITIAL_STACK_SIZE  (4 * PAGE_SIZE)
+#endif
+
+/* Size of the thread manager stack. The "- 32" avoids wasting space
+   with some malloc() implementations. */
+#ifndef THREAD_MANAGER_STACK_SIZE
+#define THREAD_MANAGER_STACK_SIZE  (2 * PAGE_SIZE - 32)
+#endif
+
+/* The base of the "array" of thread stacks.  The array will grow down from
+   here.  Defaults to the calculated bottom of the initial application
+   stack.  */
+#ifndef THREAD_STACK_START_ADDRESS
+#define THREAD_STACK_START_ADDRESS  __pthread_initial_thread_bos
+#endif
+
+/* Get some notion of the current stack.  Need not be exactly the top
+   of the stack, just something somewhere in the current frame.  */
+#ifndef CURRENT_STACK_FRAME
+#define CURRENT_STACK_FRAME  ({ char __csf; &__csf; })
+#endif
+
+/* Recover thread descriptor for the current thread */
+
+static inline pthread_descr thread_self (void) __attribute__ ((const));
+static inline pthread_descr thread_self (void)
+{
+#ifdef THREAD_SELF
+  return THREAD_SELF;
+#else
+  char *sp = CURRENT_STACK_FRAME;
+  if (sp >= __pthread_initial_thread_bos)
+    return &__pthread_initial_thread;
+  else if (sp >= __pthread_manager_thread_bos
+	   && sp < __pthread_manager_thread_tos)
+    return &__pthread_manager_thread;
+  else
+    return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1;
+#endif
+}
+
+/* Debugging */
+
+#ifdef DEBUG
+#include <assert.h>
+#define ASSERT assert
+#define MSG __pthread_message
+#else
+#define ASSERT(x)
+#define MSG(msg,arg...)
+#endif
+
+/* Internal global functions */
+
+void __pthread_destroy_specifics(void);
+void __pthread_perform_cleanup(void);
+void __pthread_sighandler(int sig);
+void __pthread_message(char * fmt, long arg, ...);
+int __pthread_manager(void *reqfd);
+void __pthread_manager_sighandler(int sig);
+void __pthread_reset_main_thread(void);
+void __fresetlockfiles(void);
+
+
+/* Prototypes for the function without cancelation support when the
+   normal version has it.  */
+extern int __libc_close (int fd);
+extern int __libc_nanosleep (const struct timespec *requested_time,
+			     struct timespec *remaining);
+extern int __libc_read (int fd, void *buf, size_t count);
+extern pid_t __libc_waitpid (pid_t pid, int *stat_loc, int options);
+extern int __libc_write (int fd, const void *buf, size_t count);