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authorWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2016-05-18 18:41:24 +0200
commit6a8ccc95528f5e86a8770ed15ce89609b5b3dee9 (patch)
treebbd4df35b4d4a6a8b00d7a5e61fb2668b850ad62 /libpthread/linuxthreads/cancel.c
parent398a27a5b323956344b4f831d892fed3bd9813c7 (diff)
remove linuxthreads.new, rename linuxthreads.old
Linuxthreads.new isn't really useful with the existence of NPTL/TLS for well supported architectures. There is no reason to use LT.new for ARM/MIPS or other architectures supporting NPTL/TLS. It is not available for noMMU architectures like Blackfin or FR-V. To simplify the live of the few uClibc-ng developers, LT.new is removed and LT.old is renamed to LT. LINUXTHREADS_OLD -> UCLIBC_HAS_LINUXTHREADS
Diffstat (limited to 'libpthread/linuxthreads/cancel.c')
-rw-r--r--libpthread/linuxthreads/cancel.c90
1 files changed, 36 insertions, 54 deletions
diff --git a/libpthread/linuxthreads/cancel.c b/libpthread/linuxthreads/cancel.c
index 21b8d900c..392d1d586 100644
--- a/libpthread/linuxthreads/cancel.c
+++ b/libpthread/linuxthreads/cancel.c
@@ -19,6 +19,13 @@
#include "internals.h"
#include "spinlock.h"
#include "restart.h"
+#ifdef __UCLIBC_HAS_RPC__
+#include <rpc/rpc.h>
+extern void __rpc_thread_destroy(void);
+#endif
+#include <bits/stackinfo.h>
+
+#include <stdio.h>
#ifdef _STACK_GROWS_DOWN
# define FRAME_LEFT(frame, other) ((char *) frame >= (char *) other)
@@ -28,8 +35,10 @@
# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
#endif
+libpthread_hidden_proto(pthread_setcancelstate)
+libpthread_hidden_proto(pthread_setcanceltype)
-int __pthread_setcancelstate(int state, int * oldstate)
+int pthread_setcancelstate(int state, int * oldstate)
{
pthread_descr self = thread_self();
if (state < PTHREAD_CANCEL_ENABLE || state > PTHREAD_CANCEL_DISABLE)
@@ -42,9 +51,9 @@ int __pthread_setcancelstate(int state, int * oldstate)
__pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
return 0;
}
-strong_alias (__pthread_setcancelstate, pthread_setcancelstate)
+libpthread_hidden_def(pthread_setcancelstate)
-int __pthread_setcanceltype(int type, int * oldtype)
+int pthread_setcanceltype(int type, int * oldtype)
{
pthread_descr self = thread_self();
if (type < PTHREAD_CANCEL_DEFERRED || type > PTHREAD_CANCEL_ASYNCHRONOUS)
@@ -57,33 +66,7 @@ int __pthread_setcanceltype(int type, int * oldtype)
__pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
return 0;
}
-strong_alias (__pthread_setcanceltype, pthread_setcanceltype)
-
-
-/* The next two functions are similar to pthread_setcanceltype() but
- more specialized for the use in the cancelable functions like write().
- They do not need to check parameters etc. */
-int
-attribute_hidden
-__pthread_enable_asynccancel (void)
-{
- pthread_descr self = thread_self();
- int oldtype = THREAD_GETMEM(self, p_canceltype);
- THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_ASYNCHRONOUS);
- if (__builtin_expect (THREAD_GETMEM(self, p_canceled), 0) &&
- THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)
- __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
- return oldtype;
-}
-
-void
-internal_function attribute_hidden
-__pthread_disable_asynccancel (int oldtype)
-{
- pthread_descr self = thread_self();
- THREAD_SETMEM(self, p_canceltype, oldtype);
-}
-
+libpthread_hidden_def(pthread_setcanceltype)
int pthread_cancel(pthread_t thread)
{
@@ -184,6 +167,7 @@ void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer * buffer,
THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED);
THREAD_SETMEM(self, p_cleanup, buffer);
}
+strong_alias(_pthread_cleanup_push_defer,__pthread_cleanup_push_defer)
void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer * buffer,
int execute)
@@ -197,36 +181,26 @@ void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer * buffer,
THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS)
__pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME);
}
+strong_alias(_pthread_cleanup_pop_restore,__pthread_cleanup_pop_restore)
+
-extern void __rpc_thread_destroy(void);
void __pthread_perform_cleanup(char *currentframe)
{
pthread_descr self = thread_self();
- struct _pthread_cleanup_buffer *c = THREAD_GETMEM(self, p_cleanup);
- struct _pthread_cleanup_buffer *last;
-
- if (c != NULL)
- while (FRAME_LEFT (currentframe, c))
- {
- last = c;
- c = c->__prev;
-
- if (c == NULL || FRAME_LEFT (last, c))
- {
- c = NULL;
- break;
- }
- }
-
- while (c != NULL)
- {
- c->__routine(c->__arg);
+ struct _pthread_cleanup_buffer * c;
- last = c;
- c = c->__prev;
-
- if (FRAME_LEFT (last, c))
+ for (c = THREAD_GETMEM(self, p_cleanup); c != NULL; c = c->__prev)
+ {
+#ifdef _STACK_GROWS_DOWN
+ if ((char *) c <= currentframe)
break;
+#elif defined _STACK_GROWS_UP
+ if ((char *) c >= currentframe)
+ break;
+#else
+# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP"
+#endif
+ c->__routine(c->__arg);
}
#ifdef __UCLIBC_HAS_RPC__
@@ -235,3 +209,11 @@ void __pthread_perform_cleanup(char *currentframe)
__rpc_thread_destroy ();
#endif
}
+
+#ifndef __PIC__
+/* We need a hook to force the cancellation wrappers to be linked in when
+ static libpthread is used. */
+extern const char __pthread_provide_wrappers;
+static const char *const __pthread_require_wrappers =
+ &__pthread_provide_wrappers;
+#endif