src/drm.cpp


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/* SPDX-License-Identifier: MIT */

#include "drm++/drm.hpp"
#include "drm++/helper.hpp"
#include "drm++/ioctl.hpp"

#include <stdexcept>

#include <drm.h>
#include <unistd.h>

using namespace drm;

Device::Device(int fd) : m_fd(fd) {
    if (this->m_fd < 0) {
        throw std::invalid_argument("invalid file descriptor");
    }

    drm_auth args{

    };
    ioctl::perform(this->m_fd, DRM_IOCTL_GET_MAGIC, args);
    this->m_magic = args.magic;
}

void Device::acquireMaster() const {
    ioctl::perform(this->m_fd, DRM_IOCTL_SET_MASTER);
}

void Device::releaseMaster() const {
    ioctl::perform(this->m_fd, DRM_IOCTL_DROP_MASTER);
}

void Device::authenticate(u32 magic) const {
    drm_auth args{
        .magic = magic
    };
    ioctl::perform(this->m_fd, DRM_IOCTL_AUTH_MAGIC, args);
}

void Device::destruct() noexcept {
    if (this->m_fd < 0) {
        return;
    }

    ::close(this->m_fd);
    this->m_fd = -1;
}