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nptl: Consolidate async cancel enable/disable implementation in libc

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Previously, the source file nptl/cancellation.c was compiled multiple
times, for libc, libpthread, librt.  This commit switches to a single
implementation, with new __pthread_enable_asynccancel@@GLIBC_PRIVATE,
__pthread_disable_asynccancel@@GLIBC_PRIVATE exports.

The almost-unused CANCEL_ASYNC and CANCEL_RESET macros are replaced
by LIBC_CANCEL_ASYNC and LIBC_CANCEL_ASYNC macros.  They call the
__pthread_* functions unconditionally now.  The macros are still
needed because shared code uses them; Hurd has different definitions.

Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
This commit is contained in:
Florian Weimer
2021-05-05 17:15:57 +02:00
parent 0197c1bc60
commit ce0b7961ae
14 changed files with 25 additions and 110 deletions
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nptl/pthreadP.h
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@ -567,8 +567,6 @@ libc_hidden_proto (__pthread_exit)
extern int __pthread_join (pthread_t threadid, void **thread_return);
extern int __pthread_setcanceltype (int type, int *oldtype);
libc_hidden_proto (__pthread_setcanceltype)
extern int __pthread_enable_asynccancel (void) attribute_hidden;
extern void __pthread_disable_asynccancel (int oldtype) attribute_hidden;
extern void __pthread_testcancel (void);
libc_hidden_proto (__pthread_testcancel)
extern int __pthread_clockjoin_ex (pthread_t, void **, clockid_t,