PsAuxFile.cc

/*
 * 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.
 */
 
#include "modules/subsys/posix/PsAuxFile.h"
 
#include "modules/drivers/x86/ps2mouse/Ps2Mouse.h"
 
PsAuxFile::~PsAuxFile() {
  m_MouseRegistration.reset();
}
 
bool PsAuxFile::initialise() {
  // g_Ps2Mouse is a weak extern, so if nothing defines it it'll be null
  // This could happen if the ps2mouse driver fails to load.
  if (!g_Ps2Mouse) {
    return false;
  }
 
  return g_Ps2Mouse->subscribe(subscriber, this, m_MouseRegistration);
}
 
uint64_t PsAuxFile::readBytewise(uint64_t location, uint64_t size, uintptr_t buffer,
                                 bool bCanBlock) {
  return m_Buffer.read(reinterpret_cast<uint8_t*>(buffer), size, bCanBlock);
}
 
uint64_t PsAuxFile::writeBytewise(uint64_t location, uint64_t size, uintptr_t buffer,
                                  bool bCanBlock) {
  g_Ps2Mouse->write(reinterpret_cast<const char*>(buffer), size);
  return size;
}
 
int PsAuxFile::select(bool bWriting, int timeout) {
  if (bWriting) {
    return m_Buffer.canWrite(timeout == 1) ? 1 : 0;
  } else {
    return m_Buffer.canRead(timeout == 1) ? 1 : 0;
  }
}
 
void PsAuxFile::subscriber(void* param, const void* buffer, size_t len) {
  reinterpret_cast<PsAuxFile*>(param)->handleIncoming(buffer, len);
}
 
void PsAuxFile::handleIncoming(const void* buffer, size_t len) {
  if (m_Buffer.write(reinterpret_cast<const uint8_t*>(buffer), len, false)) {
    dataChanged();
  }
}