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// Copyright (c) 2013 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 "base/process/process_metrics.h"
#include <sys/resource.h>
#include <sys/time.h>
#include "base/logging.h"
namespace base {
int64 TimeValToMicroseconds(const struct timeval& tv) {
static const int kMicrosecondsPerSecond = 1000000;
int64 ret = tv.tv_sec; // Avoid (int * int) integer overflow.
ret *= kMicrosecondsPerSecond;
ret += tv.tv_usec;
return ret;
}
ProcessMetrics::~ProcessMetrics() { }
#if defined(OS_LINUX)
static const rlim_t kSystemDefaultMaxFds = 8192;
#elif defined(OS_MACOSX)
static const rlim_t kSystemDefaultMaxFds = 256;
#elif defined(OS_SOLARIS)
static const rlim_t kSystemDefaultMaxFds = 8192;
#elif defined(OS_FREEBSD)
static const rlim_t kSystemDefaultMaxFds = 8192;
#elif defined(OS_OPENBSD)
static const rlim_t kSystemDefaultMaxFds = 256;
#elif defined(OS_ANDROID)
static const rlim_t kSystemDefaultMaxFds = 1024;
#endif
size_t GetMaxFds() {
rlim_t max_fds;
struct rlimit nofile;
if (getrlimit(RLIMIT_NOFILE, &nofile)) {
// getrlimit failed. Take a best guess.
max_fds = kSystemDefaultMaxFds;
RAW_LOG(ERROR, "getrlimit(RLIMIT_NOFILE) failed");
} else {
max_fds = nofile.rlim_cur;
}
if (max_fds > INT_MAX)
max_fds = INT_MAX;
return static_cast<size_t>(max_fds);
}
void SetFdLimit(unsigned int max_descriptors) {
struct rlimit limits;
if (getrlimit(RLIMIT_NOFILE, &limits) == 0) {
unsigned int new_limit = max_descriptors;
if (limits.rlim_max > 0 && limits.rlim_max < max_descriptors) {
new_limit = limits.rlim_max;
}
limits.rlim_cur = new_limit;
if (setrlimit(RLIMIT_NOFILE, &limits) != 0) {
PLOG(INFO) << "Failed to set file descriptor limit";
}
} else {
PLOG(INFO) << "Failed to get file descriptor limit";
}
}
} // namespace base
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