KernelCoreSyscallManager.h

/*
 * Copyright (c) 2008-2014, Pedigree Developers
 *
 * Please see the CONTRIB file in the root of the source tree for a full
 * list of contributors.
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#ifndef KERNEL_CORE_SYSCALL_MANAGER_H
#define KERNEL_CORE_SYSCALL_MANAGER_H

#include "pedigree/kernel/compiler.h"
#include "pedigree/kernel/processor/SyscallHandler.h"
#include "pedigree/kernel/processor/state_forward.h"
#include "pedigree/kernel/processor/types.h"

class EXPORTED_PUBLIC KernelCoreSyscallManager : public SyscallHandler
{
  public:
    static KernelCoreSyscallManager &instance()
    {
        return m_Instance;
    }

    enum Function_t
    {
        yield = 0,

        link = 1,

        sleep = 2,

        functionEnd
    };

    void initialise();

    uintptr_t call(
        Function_t function, uintptr_t p1 = 0, uintptr_t p2 = 0,
        uintptr_t p3 = 0, uintptr_t p4 = 0, uintptr_t p5 = 0);

    virtual uintptr_t syscall(SyscallState &state);

    typedef uintptr_t (*SyscallCallback)(SyscallState &);

    uintptr_t registerSyscall(Function_t function, SyscallCallback func);

  protected:
    inline KernelCoreSyscallManager();
    inline virtual ~KernelCoreSyscallManager();

  private:
    KernelCoreSyscallManager(const KernelCoreSyscallManager &);
    KernelCoreSyscallManager &operator=(const KernelCoreSyscallManager &);

    static KernelCoreSyscallManager m_Instance;

    SyscallCallback m_Functions[16];
};

#endif