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authorMike Frysinger <vapier@gentoo.org>2005-09-09 02:39:12 +0000
committerMike Frysinger <vapier@gentoo.org>2005-09-09 02:39:12 +0000
commit43014917a316b581cca09dbc32c04cbdb517ffda (patch)
tree22fbf2b02fc53faca01ee01fc8d96c7fc7056b69 /libpthread/linuxthreads/internals.h
parent49c46892a8bf1d88917f4786dc389677ca0124d1 (diff)
sync with glibc by moving the thread_desc stuff out of internals.h and into a new file descr.h ... also redo thread_desc init by specifying members in the struct by name rather than position
Diffstat (limited to 'libpthread/linuxthreads/internals.h')
-rw-r--r--libpthread/linuxthreads/internals.h253
1 files changed, 29 insertions, 224 deletions
diff --git a/libpthread/linuxthreads/internals.h b/libpthread/linuxthreads/internals.h
index 6bb80cd9e..1f60caac3 100644
--- a/libpthread/linuxthreads/internals.h
+++ b/libpthread/linuxthreads/internals.h
@@ -19,6 +19,7 @@
/* Includes */
+#include <features.h>
#include <bits/libc-tsd.h> /* for _LIBC_TSD_KEY_N */
#include <limits.h>
#include <setjmp.h>
@@ -27,8 +28,10 @@
#include <bits/stackinfo.h>
#include <sys/types.h>
#include "pt-machine.h"
+#include <ucontext.h>
+#include <bits/sigcontextinfo.h>
#include "semaphore.h"
-#include "../linuxthreads_db/thread_dbP.h"
+#include "descr.h"
#ifdef __UCLIBC_HAS_XLOCALE__
#include <bits/uClibc_locale.h>
#endif /* __UCLIBC_HAS_XLOCALE__ */
@@ -52,30 +55,14 @@
# define THREAD_SETMEM_NC(descr, member, value) descr->member = (value)
#endif
-/* 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)
+#if !defined NOT_IN_libc && defined FLOATING_STACKS
+# define LIBC_THREAD_GETMEM(descr, member) THREAD_GETMEM (descr, member)
+# define LIBC_THREAD_SETMEM(descr, member, value) \
+ THREAD_SETMEM (descr, member, value)
+#else
+# define LIBC_THREAD_GETMEM(descr, member) descr->member
+# define LIBC_THREAD_SETMEM(descr, member, value) descr->member = (value)
+#endif
typedef void (*destr_function)(void *);
@@ -85,105 +72,9 @@ struct pthread_key_struct {
};
-#define PTHREAD_START_ARGS_INITIALIZER { NULL, NULL, {{0, }}, 0, { 0 } }
-
-/* The type of thread descriptors */
-
-typedef struct _pthread_descr_struct * pthread_descr;
-
-/* Callback interface for removing the thread from waiting on an
- object if it is cancelled while waiting or about to wait.
- This hold a pointer to the object, and a pointer to a function
- which ``extricates'' the thread from its enqueued state.
- The function takes two arguments: pointer to the wait object,
- and a pointer to the thread. It returns 1 if an extrication
- actually occured, and hence the thread must also be signalled.
- It returns 0 if the thread had already been extricated. */
-
-typedef struct _pthread_extricate_struct {
- void *pu_object;
- int (*pu_extricate_func)(void *, pthread_descr);
-} pthread_extricate_if;
-
-/* Atomic counter made possible by compare_and_swap */
-
-struct pthread_atomic {
- long p_count;
- int p_spinlock;
-};
+#define PTHREAD_START_ARGS_INITIALIZER(fct) \
+ { (void *(*) (void *)) fct, NULL, {{0, }}, 0, { 0 } }
-/* Context info for read write locks. The pthread_rwlock_info structure
- is information about a lock that has been read-locked by the thread
- in whose list this structure appears. The pthread_rwlock_context
- is embedded in the thread context and contains a pointer to the
- head of the list of lock info structures, as well as a count of
- read locks that are untracked, because no info structure could be
- allocated for them. */
-
-struct _pthread_rwlock_t;
-
-typedef struct _pthread_rwlock_info {
- struct _pthread_rwlock_info *pr_next;
- struct _pthread_rwlock_t *pr_lock;
- int pr_lock_count;
-} pthread_readlock_info;
-
-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_descr p_nextlock; /* can be on a queue and waiting on a lock */
- pthread_t p_tid; /* Thread identifier */
- int p_pid; /* PID of Unix process */
- int p_priority; /* Thread priority (== 0 if not realtime) */
- struct _pthread_fastlock * p_lock; /* 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 */
- char * p_in_sighandler; /* stack address of sighandler, or NULL */
- char p_sigwaiting; /* true if a sigwait() is in progress */
- 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 */
- int p_userstack; /* nonzero if the user provided the stack */
- void *p_guardaddr; /* address of guard area or NULL */
- size_t p_guardsize; /* size of guard area */
- pthread_descr p_self; /* Pointer to this structure */
- int p_nr; /* Index of descriptor in __pthread_handles */
- int p_report_events; /* Nonzero if events must be reported. */
- td_eventbuf_t p_eventbuf; /* Data for event. */
- struct pthread_atomic p_resume_count; /* number of times restart() was
- called on thread */
- char p_woken_by_cancel; /* cancellation performed wakeup */
- char p_condvar_avail; /* flag if conditional variable became avail */
- char p_sem_avail; /* flag if semaphore became available */
- pthread_extricate_if *p_extricate; /* See above */
- pthread_readlock_info *p_readlock_list; /* List of readlock info structs */
- pthread_readlock_info *p_readlock_free; /* Free list of structs */
- int p_untracked_readlock_count; /* Readlocks not tracked by list */
- /* New elements must be added at the end. */
-#ifdef __UCLIBC_HAS_XLOCALE__
- __locale_t locale; /* thread-specific locale from uselocale() only! */
-#endif /* __UCLIBC_HAS_XLOCALE__ */
-} __attribute__ ((aligned(32))); /* We need to align the structure so that
- doubles are aligned properly. This is 8
- bytes on MIPS and 16 bytes on MIPS64.
- 32 bytes might give better cache
- utilization. */
/* The type of thread handles. */
@@ -225,6 +116,16 @@ struct pthread_request {
};
+
+typedef void (*arch_sighandler_t) (int, SIGCONTEXT);
+union sighandler
+{
+ arch_sighandler_t old;
+ void (*rt) (int, struct siginfo *, struct ucontext *);
+};
+extern union sighandler __sighandler[NSIG];
+
+
/* Signals used for suspend/restart and for cancellation notification. */
extern int __pthread_sig_restart;
@@ -240,41 +141,10 @@ extern int __pthread_sig_debug;
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. */
-
-/* For non-MMU systems also remember to stack top of the initial thread.
- * This is adapted when other stacks are malloc'ed since we don't know
- * the bounds a-priori. -StS */
-
-extern char *__pthread_initial_thread_bos;
-#ifndef __ARCH_HAS_MMU__
-extern char *__pthread_initial_thread_tos;
-#define NOMMU_INITIAL_THREAD_BOUNDS(tos,bos) if ((tos)>=__pthread_initial_thread_bos && (bos)<=__pthread_initial_thread_tos) __pthread_initial_thread_bos = (tos)+1
-#else
-#define NOMMU_INITIAL_THREAD_BOUNDS(tos,bos) /* empty */
-#endif /* __ARCH_HAS_MMU__ */
-
-
-/* Indicate whether at least one thread has a user-defined stack (if 1),
- or all threads have stacks supplied by LinuxThreads (if 0). */
-
-extern int __pthread_nonstandard_stacks;
-
/* File descriptor for sending requests to the thread manager.
Initially -1, meaning that __pthread_initialize_manager must be called. */
@@ -289,11 +159,6 @@ extern int __pthread_manager_reader;
extern size_t __pthread_max_stacksize;
#endif
-/* 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;
@@ -322,6 +187,11 @@ static inline pthread_handle thread_handle(pthread_t id)
static inline int invalid_handle(pthread_handle h, pthread_t id)
{
+ return h->h_descr == NULL || h->h_descr->p_tid != id || h->h_descr->p_terminated;
+}
+
+static inline int nonexisting_handle(pthread_handle h, pthread_t id)
+{
return h->h_descr == NULL || h->h_descr->p_tid != id;
}
@@ -351,17 +221,6 @@ extern size_t __pagesize;
#define THREAD_MANAGER_STACK_SIZE (2 * __pagesize - 32)
#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
-#ifdef __ARCH_HAS_MMU__
-#define STACK_SIZE (2 * 1024 * 1024)
-#else
-#define STACK_SIZE (4 * __pagesize)
-#endif
-#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. */
@@ -369,12 +228,6 @@ extern size_t __pagesize;
#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
-
/* If MEMORY_BARRIER isn't defined in pt-machine.h, assume the
architecture doesn't need a memory barrier instruction (e.g. Intel
x86). Still we need the compiler to respect the barrier and emit
@@ -415,54 +268,6 @@ extern size_t __pagesize;
#define SPIN_SLEEP_DURATION 2000001
#endif
-/* Recover thread descriptor for the current thread */
-
-extern pthread_descr __pthread_find_self (void) __attribute__ ((const));
-
-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;
-#ifdef __ARCH_HAS_MMU__
- 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 if (__pthread_nonstandard_stacks)
- return __pthread_find_self();
- else
- return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1;
-#else
- /* For non-MMU we need to be more careful about the initial thread stack.
- * We refine the initial thread stack bounds dynamically as we allocate
- * the other stack frame such that it doesn't overlap with them. Then
- * we can be sure to pick the right thread according to the current SP */
-
- /* Since we allow other stack frames to be above or below, we need to
- * treat this case special. When pthread_initialize() wasn't called yet,
- * only the initial thread is there. */
- if (__pthread_initial_thread_bos == NULL) {
- return &__pthread_initial_thread;
- }
- else if (sp >= __pthread_initial_thread_bos
- && sp < __pthread_initial_thread_tos) {
- return &__pthread_initial_thread;
- }
- else if (sp >= __pthread_manager_thread_bos
- && sp < __pthread_manager_thread_tos) {
- return &__pthread_manager_thread;
- }
- else {
- return __pthread_find_self();
- }
-#endif /* __ARCH_HAS_MMU__ */
-#endif
-}
-
/* Debugging */
#ifdef DEBUG