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nptl: Make pthread_attr_t dynamically extensible

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This introduces the function __pthread_attr_extension to allocate the
extension space, which is freed by pthread_attr_destroy.

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
This commit is contained in:
Florian Weimer
2020-06-02 10:33:30 +02:00
parent 6993670b52
commit 7538d46113
10 changed files with 98 additions and 33 deletions
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6
nptl/pthreadP.h
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@ -578,6 +578,12 @@ extern void __shm_directory_freeres (void) attribute_hidden;
extern void __wait_lookup_done (void) attribute_hidden;
/* Allocates the extension space for ATTR. Returns an error code on
memory allocation failure, zero on success. If ATTR already has an
extension space, this function does nothing. */
int __pthread_attr_extension (struct pthread_attr *attr) attribute_hidden
__attribute_warn_unused_result__;
#ifdef SHARED
# define PTHREAD_STATIC_FN_REQUIRE(name)
#else