28 lines
859 B
C
28 lines
859 B
C
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#ifndef SENTRY_UNIX_SPINLOCK_H_INCLUDED
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#define SENTRY_UNIX_SPINLOCK_H_INCLUDED
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#include "sentry_boot.h"
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typedef volatile sig_atomic_t sentry_spinlock_t;
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/**
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* On UNIX Systems, inside the signal handler, sentry will switch from standard
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* `malloc` to a custom page-based allocator, which is protected by this special
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* spinlock.
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*/
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#if (defined(__i386__) || defined(__amd64__))
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# define sentry__cpu_relax() __asm__ __volatile__("pause\n")
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#else
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# define sentry__cpu_relax() (void)0
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#endif
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#define SENTRY__SPINLOCK_INIT 0
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#define sentry__spinlock_lock(spinlock_ref) \
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while (!__sync_bool_compare_and_swap(spinlock_ref, 0, 1)) { \
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sentry__cpu_relax(); \
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}
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#define sentry__spinlock_unlock(spinlock_ref) (*spinlock_ref = 0)
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#endif
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