mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-17 16:10:29 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make locks more reliable

Browse source 
This change switches most of the core locks to be re-entrant, in order
to reduce the chance of deadlocking code that does, clever things with
asynchronous signal handlers. This change implements it it in pthreads
so we're one step closer to having a standardized threading primitives
This commit is contained in:
Justine Tunney 2022-06-11 01:59:26 -07:00
parent 5ea618f0af
commit c260345e06
35 changed files with 369 additions and 258 deletions
Download patch file Download diff file Expand all files Collapse all files

12
libc/calls/state.internal.h
View file

@ -1,19 +1,21 @@
#ifndef COSMOPOLITAN_LIBC_CALLS_STATE_INTERNAL_H_
#define COSMOPOLITAN_LIBC_CALLS_STATE_INTERNAL_H_
#include "libc/intrin/spinlock.h"
#include "libc/intrin/pthread.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
hidden extern int __vforked;
hidden extern int __fds_lock_obj;
hidden extern int __sig_lock_obj;
hidden extern bool __time_critical;
hidden extern unsigned __sighandrvas[NSIG];
hidden extern unsigned __sighandflags[NSIG];
hidden extern pthread_mutex_t __sig_lock_obj;
hidden extern pthread_mutex_t __fds_lock_obj;
hidden extern const struct NtSecurityAttributes kNtIsInheritable;
void __fds_lock(void);
#define __fds_unlock() _spunlock(&__fds_lock_obj)
#define __fds_lock() pthread_mutex_lock(&__fds_lock_obj)
#define __fds_unlock() pthread_mutex_unlock(&__fds_lock_obj)
#define __sig_lock() pthread_mutex_lock(&__sig_lock_obj)
#define __sig_unlock() pthread_mutex_unlock(&__sig_lock_obj)
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */