Andrea Maria Piana e65760ca85 Add basic peersyncing
This commit adds basic syncing capabilities with peers if they are both
online.

It updates the work done on MVDS, but I decided to create the code in
status-go instead, since it's very tight to the application (similarly
the code that was the inspiration for mvds, bramble, is all tight
together at the database level).

I reused parts of the protobufs.

The flow is:

1) An OFFER message is sent periodically with a bunch of message-ids and
   group-ids.
2) Anyone can REQUEST some of those messages if not present in their
   database.

3) The peer will then send over those messages.

It's disabled by default, but I am planning to add a way to set up the
flags.
2024-01-23 12:46:17 +00:00

40 lines
810 B
C

#ifndef _SEMAPHORE_H
#define _SEMAPHORE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
#define __NEED_time_t
#define __NEED_struct_timespec
#include <bits/alltypes.h>
#include <fcntl.h>
#define SEM_FAILED ((sem_t *)0)
typedef struct {
volatile int __val[4*sizeof(long)/sizeof(int)];
} sem_t;
int sem_close(sem_t *);
int sem_destroy(sem_t *);
int sem_getvalue(sem_t *__restrict, int *__restrict);
int sem_init(sem_t *, int, unsigned);
sem_t *sem_open(const char *, int, ...);
int sem_post(sem_t *);
int sem_timedwait(sem_t *__restrict, const struct timespec *__restrict);
int sem_trywait(sem_t *);
int sem_unlink(const char *);
int sem_wait(sem_t *);
#if _REDIR_TIME64
__REDIR(sem_timedwait, __sem_timedwait_time64);
#endif
#ifdef __cplusplus
}
#endif
#endif