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LibCore: Convert AnonymousBuffer to use System::anon_create

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kleines Filmröllchen 2022-02-08 10:42:15 +01:00 committed by Andreas Kling
parent cf1f58d51c
commit 6409618413
1 changed files with 2 additions and 30 deletions
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32
Userland/Libraries/LibCore/AnonymousBuffer.cpp
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@ -6,44 +6,16 @@
#include <AK/Try.h>
#include <LibCore/AnonymousBuffer.h>
#include <LibCore/System.h>
#include <LibIPC/File.h>
#include <fcntl.h>
#include <sys/mman.h>
#if defined(__serenity__)
# include <serenity.h>
#endif
#if defined(__linux__) && !defined(MFD_CLOEXEC)
# include <linux/memfd.h>
# include <sys/syscall.h>
static int memfd_create(const char* name, unsigned int flags)
{
return syscall(SYS_memfd_create, name, flags);
}
#endif
namespace Core {
ErrorOr<AnonymousBuffer> AnonymousBuffer::create_with_size(size_t size)
{
int fd = -1;
#if defined(__serenity__)
fd = anon_create(round_up_to_power_of_two(size, PAGE_SIZE), O_CLOEXEC);
if (fd < 0)
return Error::from_errno(errno);
#elif defined(__linux__)
fd = memfd_create("", MFD_CLOEXEC);
if (fd < 0)
return Error::from_errno(errno);
if (ftruncate(fd, size) < 0) {
close(fd);
return Error::from_errno(errno);
}
#endif
if (fd < 0)
return Error::from_errno(errno);
auto fd = TRY(Core::System::anon_create(size, O_CLOEXEC));
return create_from_anon_fd(fd, size);
}