140 static bool check_signals = true;
141
142 static pid_t _initial_pid = 0;
143
144 /* Signal number used to suspend/resume a thread */
145
146 /* do not use any signal number less than SIGSEGV, see 4355769 */
147 static int SR_signum = SIGUSR2;
148 sigset_t SR_sigset;
149
150
151 ////////////////////////////////////////////////////////////////////////////////
152 // utility functions
153
154 static int SR_initialize();
155
156 julong os::available_memory() {
157 return Bsd::available_memory();
158 }
159
160 julong os::Bsd::available_memory() {
161 // XXXBSD: this is just a stopgap implementation
162 return physical_memory() >> 2;
163 }
164
165 julong os::physical_memory() {
166 return Bsd::physical_memory();
167 }
168
169 ////////////////////////////////////////////////////////////////////////////////
170 // environment support
171
172 bool os::getenv(const char* name, char* buf, int len) {
173 const char* val = ::getenv(name);
174 if (val != NULL && strlen(val) < (size_t)len) {
175 strcpy(buf, val);
176 return true;
177 }
178 if (len > 0) buf[0] = 0; // return a null string
179 return false;
180 }
181
182
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140 static bool check_signals = true;
141
142 static pid_t _initial_pid = 0;
143
144 /* Signal number used to suspend/resume a thread */
145
146 /* do not use any signal number less than SIGSEGV, see 4355769 */
147 static int SR_signum = SIGUSR2;
148 sigset_t SR_sigset;
149
150
151 ////////////////////////////////////////////////////////////////////////////////
152 // utility functions
153
154 static int SR_initialize();
155
156 julong os::available_memory() {
157 return Bsd::available_memory();
158 }
159
160 // available here means free
161 julong os::Bsd::available_memory() {
162 uint64_t available = physical_memory() >> 2;
163 #ifdef __APPLE__
164 mach_msg_type_number_t count = HOST_VM_INFO64_COUNT;
165 vm_statistics64_data_t vmstat;
166 kern_return_t kerr = host_statistics64(mach_host_self(), HOST_VM_INFO64, (host_info64_t)&vmstat, &count);
167 if (kerr == KERN_SUCCESS) {
168 available = vmstat.free_count * os::vm_page_size();
169 }
170 #endif
171 return available;
172 }
173
174 julong os::physical_memory() {
175 return Bsd::physical_memory();
176 }
177
178 ////////////////////////////////////////////////////////////////////////////////
179 // environment support
180
181 bool os::getenv(const char* name, char* buf, int len) {
182 const char* val = ::getenv(name);
183 if (val != NULL && strlen(val) < (size_t)len) {
184 strcpy(buf, val);
185 return true;
186 }
187 if (len > 0) buf[0] = 0; // return a null string
188 return false;
189 }
190
191
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