diff options
Diffstat (limited to 'term')
| -rw-r--r-- | term/ptyio.c | 46 |
1 files changed, 44 insertions, 2 deletions
diff --git a/term/ptyio.c b/term/ptyio.c index 36265f72..3ad8d55a 100644 --- a/term/ptyio.c +++ b/term/ptyio.c @@ -54,6 +54,31 @@ static int ptyopen = 0; static int nptyperopens = 0; + +enum rb +{ + RB_OPEN = 1, + RB_BUSY = 2, + RB_INC = 3, + RB_CREATE = 4, + RB_DESTROY = 5, + RB_DEC = 6, + RB_DROP_CARR = 7, +}; + +static enum rb record_buf[10000]; +static enum rb *rbc = record_buf; +static spin_lock_t rblock = SPIN_LOCK_INITIALIZER; +static void +xxx_record (enum rb n) +{ + spin_lock (&rblock); + *rbc++ = n; + spin_unlock (&rblock); +} + + + void ptyio_init () { @@ -74,13 +99,13 @@ pty_open_hook (struct trivfs_control *cntl, if (ptyopen) { + xxx_record (RB_BUSY); mutex_unlock (&global_lock); return EBUSY; } + xxx_record (RB_OPEN); ptyopen = 1; - nptyperopens++; - report_carrier_on (); mutex_unlock (&global_lock); return 0; } @@ -88,16 +113,33 @@ pty_open_hook (struct trivfs_control *cntl, error_t pty_po_create_hook (struct trivfs_peropen *po) { + xxx_record (RB_CREATE); + mutex_lock (&global_lock); + if (po->flags & (O_READ | O_WRITE)) + { + xxx_record (RB_INC); + nptyperopens++; + report_carrier_on (); + } + mutex_unlock (&global_lock); return 0; } error_t pty_po_destroy_hook (struct trivfs_peropen *po) { + xxx_record (RB_DESTROY); mutex_lock (&global_lock); + if ((po->flags & (O_READ | O_WRITE)) == 0) + { + mutex_unlock (&global_lock); + return 0; + } nptyperopens--; + xxx_record (RB_DEC); if (!nptyperopens) { + xxx_record (RB_DROP_CARR); ptyopen = 0; report_carrier_off (); } |