mirror of
https://github.com/SerenityOS/serenity
synced 2024-10-18 05:43:09 +00:00
ac71775de5
This makes it a lot easier to return errors since we no longer have to worry about negating EFOO errors and can just return them flat.
73 lines
2.7 KiB
C++
73 lines
2.7 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright notice, this
|
|
* list of conditions and the following disclaimer.
|
|
*
|
|
* 2. Redistributions in binary form must reproduce the above copyright notice,
|
|
* this list of conditions and the following disclaimer in the documentation
|
|
* and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
|
|
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
|
|
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <AK/NonnullRefPtrVector.h>
|
|
#include <Kernel/Process.h>
|
|
#include <Kernel/VM/AnonymousVMObject.h>
|
|
#include <Kernel/VM/InodeVMObject.h>
|
|
#include <Kernel/VM/MemoryManager.h>
|
|
|
|
namespace Kernel {
|
|
|
|
KResultOr<int> Process::sys$purge(int mode)
|
|
{
|
|
REQUIRE_NO_PROMISES;
|
|
if (!is_superuser())
|
|
return EPERM;
|
|
int purged_page_count = 0;
|
|
if (mode & PURGE_ALL_VOLATILE) {
|
|
NonnullRefPtrVector<AnonymousVMObject> vmobjects;
|
|
{
|
|
InterruptDisabler disabler;
|
|
MM.for_each_vmobject([&](auto& vmobject) {
|
|
if (vmobject.is_anonymous())
|
|
vmobjects.append(vmobject);
|
|
return IterationDecision::Continue;
|
|
});
|
|
}
|
|
for (auto& vmobject : vmobjects) {
|
|
purged_page_count += vmobject.purge();
|
|
}
|
|
}
|
|
if (mode & PURGE_ALL_CLEAN_INODE) {
|
|
NonnullRefPtrVector<InodeVMObject> vmobjects;
|
|
{
|
|
InterruptDisabler disabler;
|
|
MM.for_each_vmobject([&](auto& vmobject) {
|
|
if (vmobject.is_inode())
|
|
vmobjects.append(static_cast<InodeVMObject&>(vmobject));
|
|
return IterationDecision::Continue;
|
|
});
|
|
}
|
|
for (auto& vmobject : vmobjects) {
|
|
purged_page_count += vmobject.release_all_clean_pages();
|
|
}
|
|
}
|
|
return purged_page_count;
|
|
}
|
|
|
|
}
|