diff options
Diffstat (limited to 'gpsd.h-tail')
| -rw-r--r-- | gpsd.h-tail | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gpsd.h-tail b/gpsd.h-tail index 026bc617..f8f46b19 100644 --- a/gpsd.h-tail +++ b/gpsd.h-tail @@ -207,6 +207,11 @@ struct gps_context_t { bool shmTimePPS; # endif /* PPS_ENABLE */ #endif /* NTPSHM_ENABLE */ +#ifdef SHM_EXPORT_ENABLE + /* we don't want the compiler to treat writes to shmexport as dead code, + * and we don't want them reordered either */ + /*@reldef@*/volatile char *shmexport; +#endif }; struct aivdm_context_t { @@ -705,6 +710,18 @@ extern void ecef_to_wgs84fix(/*@out@*/struct gps_fix_t *, double, double, double); extern void clear_dop(/*@out@*/struct dop_t *); +/* shmexport.c */ +#define GPSD_KEY 0x47505344 /* "GPSD" */ +struct shmexport_t +{ + int bookend1; + struct gps_data_t gpsdata; + int bookend2; +}; +extern bool shm_acquire(struct gps_context_t *); +extern void shm_release(struct gps_context_t *); +extern void shm_update(struct gps_context_t *, struct gps_data_t *); + /* srecord.c */ extern void hexdump(size_t, unsigned char *, unsigned char *); extern unsigned char sr_sum(unsigned int, unsigned int, unsigned char *); |