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