os-k/kaleid/libbuf/bflush.c

61 lines
2.4 KiB
C

//----------------------------------------------------------------------------//
// OS on Kaleid //
// //
// Desc: Buffer library //
// //
// //
// Copyright © 2018-2021 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <libbuf.h>
//
// Erases buf's content
// Can be given as a flusher
//
error_t bemptybuf(Buffer_t *buf)
{
buf->wp = buf->rp = buf->buf;
buf->lastLF = 0;
return EOK;
}
//
// Flushes a buffer, returns EBADF when not possible
//
error_t BFlushBuf(Buffer_t *buf)
{
error_t rc;
if (!buf) return EINVAL;
if (buf->flags & (BF_EOF|BF_ERR)) {
return EENDF;
}
if (!buf->flusher) {
return EBADF;
}
ExAcquireLock(&buf->lock);
rc = buf->flusher(buf);
ExReleaseLock(&buf->lock);
return rc;
}