Ryan Macnak
135 lines
3.4 KiB
C++
135 lines
3.4 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/globals.h"
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#if defined(TARGET_OS_MACOS)
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#include <mach-o/dyld.h>
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#include <sys/types.h>
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#include <sys/sysctl.h>
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#include "bin/file.h"
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#include "bin/platform.h"
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#if !TARGET_OS_IOS
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#include <crt_externs.h> // NOLINT
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#endif // !TARGET_OS_IOS
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#include <signal.h> // NOLINT
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#include <string.h> // NOLINT
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#include <unistd.h> // NOLINT
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#include "bin/fdutils.h"
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namespace dart {
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namespace bin {
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bool Platform::Initialize() {
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// Turn off the signal handler for SIGPIPE as it causes the process
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// to terminate on writing to a closed pipe. Without the signal
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// handler error EPIPE is set instead.
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struct sigaction act;
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bzero(&act, sizeof(act));
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act.sa_handler = SIG_IGN;
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if (sigaction(SIGPIPE, &act, 0) != 0) {
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perror("Setting signal handler failed");
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return false;
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}
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return true;
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}
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int Platform::NumberOfProcessors() {
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int32_t cpus = -1;
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size_t cpus_length = sizeof(cpus);
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if (sysctlbyname("hw.logicalcpu", &cpus, &cpus_length, NULL, 0) == 0) {
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return cpus;
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} else {
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// Failed, fallback to using sysconf.
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return sysconf(_SC_NPROCESSORS_ONLN);
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}
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}
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const char* Platform::OperatingSystem() {
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#if TARGET_OS_IOS
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return "ios";
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#else
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return "macos";
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#endif
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}
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const char* Platform::LibraryExtension() {
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return "dylib";
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}
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bool Platform::LocalHostname(char *buffer, intptr_t buffer_length) {
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return gethostname(buffer, buffer_length) == 0;
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}
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char** Platform::Environment(intptr_t* count) {
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#if TARGET_OS_IOS
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// TODO(iposva): On Mac (desktop), _NSGetEnviron() is used to access the
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// environ from shared libraries or bundles. This is present in crt_externs.h
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// which is unavailable on iOS. On iOS, everything is statically linked for
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// now. So arguably, accessing the environ directly with a "extern char
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// **environ" will work. But this approach is brittle as the target with this
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// CU could be a dynamic framework (introduced in iOS 8). A more elegant
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// approach needs to be devised.
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return NULL;
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#else
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// Using environ directly is only safe as long as we do not
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// provide access to modifying environment variables.
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// On MacOS you have to do a bit of magic to get to the
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// environment strings.
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char** environ = *(_NSGetEnviron());
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intptr_t i = 0;
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char** tmp = environ;
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while (*(tmp++) != NULL) i++;
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*count = i;
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char** result = new char*[i];
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for (intptr_t current = 0; current < i; current++) {
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result[current] = environ[current];
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}
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return result;
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#endif
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}
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void Platform::FreeEnvironment(char** env, intptr_t count) {
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delete[] env;
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}
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char* Platform::ResolveExecutablePath() {
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// Get the required length of the buffer.
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uint32_t path_size = 0;
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char* path = NULL;
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if (_NSGetExecutablePath(path, &path_size) == 0) {
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return NULL;
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}
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// Allocate buffer and get executable path.
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path = reinterpret_cast<char*>(malloc(path_size));
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if (_NSGetExecutablePath(path, &path_size) != 0) {
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free(path);
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return NULL;
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}
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// Return the canonical path as the returned path might contain symlinks.
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char* canon_path = File::GetCanonicalPath(path);
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free(path);
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return canon_path;
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}
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void Platform::Exit(int exit_code) {
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exit(exit_code);
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}
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} // namespace bin
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} // namespace dart
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#endif // defined(TARGET_OS_MACOS)
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