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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <errno.h>
#include <time.h>
#include "components/nacl/loader/nonsfi/abi_conversion.h"
#include "components/nacl/loader/nonsfi/irt_interfaces.h"
#include "native_client/src/trusted/service_runtime/include/sys/time.h"
namespace nacl {
namespace nonsfi {
namespace {
bool NaClAbiClockIdToClockId(int nacl_clk_id, clockid_t* host_clk_id) {
switch (nacl_clk_id) {
case NACL_ABI_CLOCK_REALTIME:
*host_clk_id = CLOCK_REALTIME;
break;
case NACL_ABI_CLOCK_MONOTONIC:
*host_clk_id = CLOCK_MONOTONIC;
break;
case NACL_ABI_CLOCK_PROCESS_CPUTIME_ID:
*host_clk_id = CLOCK_PROCESS_CPUTIME_ID;
break;
case NACL_ABI_CLOCK_THREAD_CPUTIME_ID:
*host_clk_id = CLOCK_THREAD_CPUTIME_ID;
break;
default:
// Unknown clock id.
return false;
}
return true;
}
int IrtClockGetRes(int clk_id, struct nacl_abi_timespec* res) {
clockid_t host_clk_id;
if (!NaClAbiClockIdToClockId(clk_id, &host_clk_id))
return EINVAL;
struct timespec host_res;
if (clock_getres(host_clk_id, &host_res))
return errno;
// clock_getres() requires a NULL check but clock_gettime() doesn't.
if (res)
TimeSpecToNaClAbiTimeSpec(host_res, res);
return 0;
}
int IrtClockGetTime(int clk_id, struct nacl_abi_timespec* tp) {
clockid_t host_clk_id;
if (!NaClAbiClockIdToClockId(clk_id, &host_clk_id))
return EINVAL;
struct timespec host_tp;
if (clock_gettime(host_clk_id, &host_tp))
return errno;
TimeSpecToNaClAbiTimeSpec(host_tp, tp);
return 0;
}
} // namespace
// Cast away the distinction between host types and NaCl ABI types.
const nacl_irt_clock kIrtClock = {
reinterpret_cast<int(*)(clockid_t, struct timespec*)>(IrtClockGetRes),
reinterpret_cast<int(*)(clockid_t, struct timespec*)>(IrtClockGetTime),
};
} // namespace nonsfi
} // namespace nacl
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