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sortix--sortix/sortix/textbuffer.cpp

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The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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/*******************************************************************************
Update copyright headers of old files to the current format.
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Copyright(C) Jonas 'Sortie' Termansen 2012.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
This file is part of Sortix.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
Sortix 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 (at your option) any later
version.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
Sortix 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.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
2012-07-22 18:01:12 -04:00
Update copyright headers of old files to the current format.
2013-07-10 09:26:01 -04:00
textbuffer.cpp
Provides a indexable text buffer for used by text mode terminals.
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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*******************************************************************************/
#include <sortix/kernel/platform.h>
#include <sortix/kernel/kthread.h>
#include <sortix/kernel/refcount.h>
#include <sortix/kernel/textbuffer.h>
Replace ASSERT with assert of <assert.h>.
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#include <assert.h>
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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namespace Sortix {
TextBufferHandle::TextBufferHandle(TextBuffer* textbuf, bool deletebuf,
TextBuffer* def, bool deletedef)
{
this->textbuf = textbuf;
this->deletebuf = deletebuf;
this->def = def;
this->deletedef = deletedef;
this->numused = 0;
this->mutex = KTHREAD_MUTEX_INITIALIZER;
this->unusedcond = KTHREAD_COND_INITIALIZER;
}
TextBufferHandle::~TextBufferHandle()
{
if ( deletebuf )
delete textbuf;
if ( deletedef )
delete def;
}
TextBuffer* TextBufferHandle::Acquire()
{
ScopedLock lock(&mutex);
numused++;
if ( textbuf )
return textbuf;
if ( !def )
numused--;
return def;
}
void TextBufferHandle::Release(TextBuffer* textbuf)
{
Replace ASSERT with assert of <assert.h>.
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assert(textbuf);
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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ScopedLock lock(&mutex);
Replace ASSERT with assert of <assert.h>.
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assert(numused);
The console can now be rendered to any text buffer. The console renderer now renders to a text buffer, which can be implemented on any device, whether it's the VGA text buffer or a bitmap graphics device with font rendering. This replaces the older code that could only render to a VGA framebuffer and where the input parsing was tightly coupled with the device rendering phase.
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if ( !--numused )
kthread_cond_signal(&unusedcond);
}
void TextBufferHandle::Replace(TextBuffer* newtextbuf, bool deletebuf)
{
ScopedLock lock(&mutex);
while ( numused )
kthread_cond_wait(&unusedcond, &mutex);
if ( deletebuf )
delete textbuf;
this->textbuf = newtextbuf;
this->deletebuf = deletebuf;
}
} // namespace Sortix
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