e5106342c6
_foo - wrapped system call foo - weak definition to _foo and for cancellation points: _foo - wrapped system call __foo - enter cancellation point, call _foo(), leave cancellation point foo - weak definition to __foo Change use of global _thread_run to call a function to get the currently running thread. Make all pthread_foo functions weak definitions to _pthread_foo, where _pthread_foo is the implementation. This allows an application to provide its own pthread functions. Provide slightly different versions of pthread_mutex_lock and pthread_mutex_init so that we can tell the difference between a libc mutex and an application mutex. Threads holding mutexes internal to libc should never be allowed to exit, call signal handlers, or cancel. Approved by: -arch
43 lines
817 B
C
43 lines
817 B
C
/*
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* David Leonard <d@openbsd.org>, 1999. Public Domain.
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*
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* $OpenBSD: uthread_msync.c,v 1.2 1999/06/09 07:16:17 d Exp $
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <pthread.h>
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#include "pthread_private.h"
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#pragma weak msync=__msync
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int
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_msync(void *addr, size_t len, int flags)
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{
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int ret;
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ret = __sys_msync(addr, len, flags);
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return (ret);
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}
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int
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__msync(void *addr, size_t len, int flags)
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{
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int ret;
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/*
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* XXX This is quite pointless unless we know how to get the
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* file descriptor associated with the memory, and lock it for
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* write. The only real use of this wrapper is to guarantee
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* a cancellation point, as per the standard. sigh.
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*/
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_thread_enter_cancellation_point();
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ret = _msync(addr, len, flags);
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_thread_leave_cancellation_point();
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return ret;
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}
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