mailing list of musl libc

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 #ifndef _SYS_EVENTFD_H
#define _SYS_EVENTFD_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdint.h>

typedef uint64_t eventfd_t;

#define EFD_SEMAPHORE 1
#define EFD_CLOEXEC 02000000
#define EFD_NONBLOCK 04000

int eventfd(unsigned int, int);
int eventfd_read(int, eventfd_t *);
int eventfd_write(int, eventfd_t);


#ifdef __cplusplus
}
#endif

#endif /* sys/eventfd.h */