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Fastlock fixes

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This commit is contained in:
John Sully 2019-02-10 22:00:19 -05:00
parent c4dbc557eb
commit 988ea40101
2 changed files with 28 additions and 9 deletions
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10
src/fastlock.cpp
View File

@ -1,19 +1,23 @@
#include "fastlock.h"
#include <unistd.h>
extern "C" void fastlock_init(struct fastlock *lock)
{
lock->lock = 0;
lock->m_lock = 0;
}
extern "C" void fastlock_lock(struct fastlock *lock)
{
while (!__sync_bool_compare_and_swap(&lock->lock, 0, 1));
while (!__sync_bool_compare_and_swap(&lock->m_lock, 0, 1))
{
}
}
extern "C" void fastlock_unlock(struct fastlock *lock)
{
lock->lock = 0;
__sync_bool_compare_and_swap(&lock->m_lock, 1, 0);
}
extern "C" void fastlock_free(struct fastlock *lock)
{
// NOP

25
src/fastlock.h
View File

@ -4,16 +4,31 @@
extern "C" {
#endif
struct fastlock
{
int lock;
};
/* Begin C API */
struct fastlock;
void fastlock_init(struct fastlock *lock);
void fastlock_lock(struct fastlock *lock);
void fastlock_unlock(struct fastlock *lock);
void fastlock_free(struct fastlock *lock);
/* End C API */
#ifdef __cplusplus
}
#endif
struct fastlock
{
int m_lock;
#ifdef __cplusplus
void lock()
{
fastlock_lock(this);
}
void unlock()
{
fastlock_unlock(this);
}
#endif
};