From: Philip Homburg Date: Mon, 1 Aug 2005 14:40:21 +0000 (+0000) Subject: Replace REVIVE with notify. X-Git-Tag: v3.1.0~489 X-Git-Url: http://zhaoyanbai.com/repos/%22http:/www.isc.org/icons/Bv9ARM.ch09.html?a=commitdiff_plain;h=537d7ddcdf747c8417e444fa720873f108c597b3;p=minix.git Replace REVIVE with notify. --- diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c index bbc4f5849..cdbf27efd 100644 --- a/drivers/tty/pty.c +++ b/drivers/tty/pty.c @@ -17,6 +17,7 @@ */ #include "../drivers.h" +#include #include #include #include @@ -31,7 +32,7 @@ typedef struct pty { char state; /* flags: busy, closed, ... */ /* Read call on /dev/ptypX. */ - char rdrepcode; /* reply code, TASK_REPLY or REVIVE */ + char rdsendreply; /* send a reply (instead of notify) */ char rdcaller; /* process making the call (usually FS) */ char rdproc; /* process that wants to read from the pty */ vir_bytes rdvir; /* virtual address in readers address space */ @@ -39,7 +40,7 @@ typedef struct pty { int rdcum; /* # bytes written so far */ /* Write call to /dev/ptypX. */ - char wrrepcode; /* reply code, TASK_REPLY or REVIVE */ + char wrsendreply; /* send a reply (instead of notify) */ char wrcaller; /* process making the call (usually FS) */ char wrproc; /* process that wants to write to the pty */ vir_bytes wrvir; /* virtual address in writers address space */ @@ -88,7 +89,7 @@ message *m_ptr; r = 0; break; } - if (pp->rdleft != 0) { + if (pp->rdleft != 0 || pp->rdcum != 0) { r = EIO; break; } @@ -105,7 +106,7 @@ message *m_ptr; #endif break; } - pp->rdrepcode = TASK_REPLY; + pp->rdsendreply = TRUE; pp->rdcaller = m_ptr->m_source; pp->rdproc = m_ptr->PROC_NR; pp->rdvir = (vir_bytes) m_ptr->ADDRESS; @@ -119,7 +120,7 @@ message *m_ptr; pp->rdleft = pp->rdcum = 0; } else { r = SUSPEND; /* do suspend */ - pp->rdrepcode = REVIVE; + pp->rdsendreply = FALSE; } break; @@ -129,7 +130,7 @@ message *m_ptr; r = EIO; break; } - if (pp->wrleft != 0) { + if (pp->wrleft != 0 || pp->wrcum != 0) { r = EIO; break; } @@ -147,7 +148,7 @@ message *m_ptr; #endif break; } - pp->wrrepcode = TASK_REPLY; + pp->wrsendreply = TRUE; pp->wrcaller = m_ptr->m_source; pp->wrproc = m_ptr->PROC_NR; pp->wrvir = (vir_bytes) m_ptr->ADDRESS; @@ -159,7 +160,7 @@ message *m_ptr; r = pp->wrcum > 0 ? pp->wrcum : EAGAIN; pp->wrleft = pp->wrcum = 0; } else { - pp->wrrepcode = REVIVE; /* do suspend */ + pp->wrsendreply = FALSE; /* do suspend */ r = SUSPEND; } break; @@ -167,6 +168,8 @@ message *m_ptr; case DEV_OPEN: r = pp->state != 0 ? EIO : OK; pp->state |= PTY_ACTIVE; + pp->rdcum = 0; + pp->wrcum = 0; break; case DEV_CLOSE: @@ -338,8 +341,12 @@ pty_t *pp; */ if (pp->rdcum > 0) { - tty_reply(pp->rdrepcode, pp->rdcaller, pp->rdproc, pp->rdcum); - pp->rdleft = pp->rdcum = 0; + if (pp->rdsendreply) { + tty_reply(TASK_REPLY, pp->rdcaller, pp->rdproc, pp->rdcum); + pp->rdleft = pp->rdcum = 0; + } + else + notify(pp->rdcaller); } } @@ -390,8 +397,13 @@ int try; pp->wrvir++; pp->wrcum++; if (--pp->wrleft == 0) { - tty_reply(pp->wrrepcode, pp->wrcaller, pp->wrproc, pp->wrcum); - pp->wrcum = 0; + if (pp->wrsendreply) { + tty_reply(TASK_REPLY, pp->wrcaller, pp->wrproc, + pp->wrcum); + pp->wrcum = 0; + } + else + notify(pp->wrcaller); } } } @@ -410,13 +422,13 @@ int try; if (!(pp->state & PTY_ACTIVE)) return; if (pp->rdleft > 0) { - tty_reply(pp->rdrepcode, pp->rdcaller, pp->rdproc, 0); - pp->rdleft = pp->rdcum = 0; + assert(!pp->rdsendreply); + notify(pp->rdcaller); } if (pp->wrleft > 0) { - tty_reply(pp->wrrepcode, pp->wrcaller, pp->wrproc, EIO); - pp->wrleft = pp->wrcum = 0; + assert(!pp->wrsendreply); + notify(pp->wrcaller); } if (pp->state & PTY_CLOSED) pp->state = 0; else pp->state |= TTY_CLOSED; @@ -434,9 +446,10 @@ int try; pty_t *pp = tp->tty_priv; if (pp->wrleft > 0) { - tty_reply(pp->wrrepcode, pp->wrcaller, pp->wrproc, - pp->wrcum + pp->wrleft); - pp->wrleft = pp->wrcum = 0; + assert(!pp->wrsendreply); + pp->wrcum += pp->wrleft; + pp->wrleft= 0; + notify(pp->wrcaller); } } @@ -481,4 +494,48 @@ tty_t *tp; tp->tty_ocancel = pty_ocancel; tp->tty_close = pty_close; } + + +/*==========================================================================* + * pty_status * + *==========================================================================*/ +PUBLIC int pty_status(message *m_ptr) +{ + int i, event_found; + pty_t *pp; + + event_found = 0; + for (i= 0, pp = pty_table; istate & TTY_CLOSED && pp->rdleft > 0) || + pp->rdcum > 0) && + pp->rdcaller == m_ptr->m_source) + { + m_ptr->m_type = DEV_REVIVE; + m_ptr->REP_PROC_NR = pp->rdproc; + m_ptr->REP_STATUS = pp->rdcum; + + pp->rdleft = pp->rdcum = 0; + event_found = 1; + break; + } + + if (((pp->state & TTY_CLOSED && pp->wrleft > 0) || + pp->wrcum > 0) && + pp->wrcaller == m_ptr->m_source) + { + m_ptr->m_type = DEV_REVIVE; + m_ptr->REP_PROC_NR = pp->wrproc; + if (pp->wrcum == 0) + m_ptr->REP_STATUS = EIO; + else + m_ptr->REP_STATUS = pp->wrcum; + + pp->wrleft = pp->wrcum = 0; + event_found = 1; + break; + } + } + return event_found; +} + #endif /* NR_PTYS > 0 */ diff --git a/drivers/tty/tty.c b/drivers/tty/tty.c index 8e1f80b1f..57af7b7e6 100644 --- a/drivers/tty/tty.c +++ b/drivers/tty/tty.c @@ -352,6 +352,9 @@ message *m_ptr; } } + if (!event_found) + event_found = pty_status(m_ptr); + if (! event_found) { /* No events of interest were found. Return an empty message. */ m_ptr->m_type = DEV_NO_STATUS; diff --git a/drivers/tty/tty.h b/drivers/tty/tty.h index 4191f94f0..175c635a3 100644 --- a/drivers/tty/tty.h +++ b/drivers/tty/tty.h @@ -155,6 +155,7 @@ _PROTOTYPE( void kbd_interrupt, (message *m) ); /* pty.c */ _PROTOTYPE( void do_pty, (struct tty *tp, message *m_ptr) ); _PROTOTYPE( void pty_init, (struct tty *tp) ); +_PROTOTYPE( int pty_status, (message *m_ptr) ); /* vidcopy.s */ _PROTOTYPE( void vid_vid_copy, (unsigned src, unsigned dst, unsigned count));