Mercurial > hg > truffle
annotate src/os/linux/vm/os_linux.hpp @ 17845:21dd1c827123
8033696: "assert(thread != NULL) failed: just checking" due to Thread::current() and JNI pthread interaction
Reviewed-by: dholmes, dsamersoff
Contributed-by: andreas.eriksson@oracle.com
author | kevinw |
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date | Wed, 02 Apr 2014 18:40:52 +0200 |
parents | b0133e4187d3 |
children | bb9356ec5967 833b0f92429a |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef OS_LINUX_VM_OS_LINUX_HPP |
26 #define OS_LINUX_VM_OS_LINUX_HPP | |
27 | |
0 | 28 // Linux_OS defines the interface to Linux operating systems |
29 | |
30 /* pthread_getattr_np comes with LinuxThreads-0.9-7 on RedHat 7.1 */ | |
31 typedef int (*pthread_getattr_func_type) (pthread_t, pthread_attr_t *); | |
32 | |
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33 // Information about the protection of the page at address '0' on this os. |
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34 static bool zero_page_read_protected() { return true; } |
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35 |
0 | 36 class Linux { |
37 friend class os; | |
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38 friend class TestReserveMemorySpecial; |
0 | 39 |
40 // For signal-chaining | |
41 #define MAXSIGNUM 32 | |
42 static struct sigaction sigact[MAXSIGNUM]; // saved preinstalled sigactions | |
43 static unsigned int sigs; // mask of signals that have | |
44 // preinstalled signal handlers | |
45 static bool libjsig_is_loaded; // libjsig that interposes sigaction(), | |
46 // __sigaction(), signal() is loaded | |
47 static struct sigaction *(*get_signal_action)(int); | |
48 static struct sigaction *get_preinstalled_handler(int); | |
49 static void save_preinstalled_handler(int, struct sigaction&); | |
50 | |
51 static void check_signal_handler(int sig); | |
52 | |
53 // For signal flags diagnostics | |
54 static int sigflags[MAXSIGNUM]; | |
55 | |
56 static int (*_clock_gettime)(clockid_t, struct timespec *); | |
57 static int (*_pthread_getcpuclockid)(pthread_t, clockid_t *); | |
58 | |
59 static address _initial_thread_stack_bottom; | |
60 static uintptr_t _initial_thread_stack_size; | |
61 | |
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62 static const char *_glibc_version; |
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63 static const char *_libpthread_version; |
0 | 64 |
65 static bool _is_floating_stack; | |
66 static bool _is_NPTL; | |
67 static bool _supports_fast_thread_cpu_time; | |
68 | |
141 | 69 static GrowableArray<int>* _cpu_to_node; |
70 | |
0 | 71 protected: |
72 | |
73 static julong _physical_memory; | |
74 static pthread_t _main_thread; | |
75 static Mutex* _createThread_lock; | |
76 static int _page_size; | |
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77 static const int _vm_default_page_size; |
0 | 78 |
79 static julong available_memory(); | |
80 static julong physical_memory() { return _physical_memory; } | |
81 static void initialize_system_info(); | |
82 | |
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83 static int commit_memory_impl(char* addr, size_t bytes, bool exec); |
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84 static int commit_memory_impl(char* addr, size_t bytes, |
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85 size_t alignment_hint, bool exec); |
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86 |
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87 static void set_glibc_version(const char *s) { _glibc_version = s; } |
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88 static void set_libpthread_version(const char *s) { _libpthread_version = s; } |
0 | 89 |
90 static bool supports_variable_stack_size(); | |
91 | |
92 static void set_is_NPTL() { _is_NPTL = true; } | |
93 static void set_is_LinuxThreads() { _is_NPTL = false; } | |
94 static void set_is_floating_stack() { _is_floating_stack = true; } | |
95 | |
141 | 96 static void rebuild_cpu_to_node_map(); |
97 static GrowableArray<int>* cpu_to_node() { return _cpu_to_node; } | |
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98 |
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99 static size_t find_large_page_size(); |
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100 static size_t setup_large_page_size(); |
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101 |
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102 static bool setup_large_page_type(size_t page_size); |
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103 static bool transparent_huge_pages_sanity_check(bool warn, size_t pages_size); |
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104 static bool hugetlbfs_sanity_check(bool warn, size_t page_size); |
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105 |
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106 static char* reserve_memory_special_shm(size_t bytes, size_t alignment, char* req_addr, bool exec); |
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107 static char* reserve_memory_special_huge_tlbfs(size_t bytes, size_t alignment, char* req_addr, bool exec); |
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108 static char* reserve_memory_special_huge_tlbfs_only(size_t bytes, char* req_addr, bool exec); |
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109 static char* reserve_memory_special_huge_tlbfs_mixed(size_t bytes, size_t alignment, char* req_addr, bool exec); |
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110 |
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111 static bool release_memory_special_shm(char* base, size_t bytes); |
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112 static bool release_memory_special_huge_tlbfs(char* base, size_t bytes); |
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113 |
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114 static void print_full_memory_info(outputStream* st); |
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115 static void print_distro_info(outputStream* st); |
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116 static void print_libversion_info(outputStream* st); |
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117 |
0 | 118 public: |
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119 static bool _stack_is_executable; |
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120 static void *dlopen_helper(const char *name, char *ebuf, int ebuflen); |
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121 static void *dll_load_in_vmthread(const char *name, char *ebuf, int ebuflen); |
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122 |
0 | 123 static void init_thread_fpu_state(); |
124 static int get_fpu_control_word(); | |
125 static void set_fpu_control_word(int fpu_control); | |
126 static pthread_t main_thread(void) { return _main_thread; } | |
127 // returns kernel thread id (similar to LWP id on Solaris), which can be | |
128 // used to access /proc | |
129 static pid_t gettid(); | |
130 static void set_createThread_lock(Mutex* lk) { _createThread_lock = lk; } | |
131 static Mutex* createThread_lock(void) { return _createThread_lock; } | |
132 static void hotspot_sigmask(Thread* thread); | |
133 | |
134 static address initial_thread_stack_bottom(void) { return _initial_thread_stack_bottom; } | |
135 static uintptr_t initial_thread_stack_size(void) { return _initial_thread_stack_size; } | |
136 static bool is_initial_thread(void); | |
137 | |
138 static int page_size(void) { return _page_size; } | |
139 static void set_page_size(int val) { _page_size = val; } | |
140 | |
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141 static int vm_default_page_size(void) { return _vm_default_page_size; } |
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142 |
0 | 143 static address ucontext_get_pc(ucontext_t* uc); |
144 static intptr_t* ucontext_get_sp(ucontext_t* uc); | |
145 static intptr_t* ucontext_get_fp(ucontext_t* uc); | |
146 | |
147 // For Analyzer Forte AsyncGetCallTrace profiling support: | |
148 // | |
149 // This interface should be declared in os_linux_i486.hpp, but | |
150 // that file provides extensions to the os class and not the | |
151 // Linux class. | |
152 static ExtendedPC fetch_frame_from_ucontext(Thread* thread, ucontext_t* uc, | |
153 intptr_t** ret_sp, intptr_t** ret_fp); | |
154 | |
155 // This boolean allows users to forward their own non-matching signals | |
156 // to JVM_handle_linux_signal, harmlessly. | |
157 static bool signal_handlers_are_installed; | |
158 | |
159 static int get_our_sigflags(int); | |
160 static void set_our_sigflags(int, int); | |
161 static void signal_sets_init(); | |
162 static void install_signal_handlers(); | |
163 static void set_signal_handler(int, bool); | |
164 static bool is_sig_ignored(int sig); | |
165 | |
166 static sigset_t* unblocked_signals(); | |
167 static sigset_t* vm_signals(); | |
168 static sigset_t* allowdebug_blocked_signals(); | |
169 | |
170 // For signal-chaining | |
171 static struct sigaction *get_chained_signal_action(int sig); | |
172 static bool chained_handler(int sig, siginfo_t* siginfo, void* context); | |
173 | |
174 // GNU libc and libpthread version strings | |
199
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175 static const char *glibc_version() { return _glibc_version; } |
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176 static const char *libpthread_version() { return _libpthread_version; } |
0 | 177 |
178 // NPTL or LinuxThreads? | |
179 static bool is_LinuxThreads() { return !_is_NPTL; } | |
180 static bool is_NPTL() { return _is_NPTL; } | |
181 | |
182 // NPTL is always floating stack. LinuxThreads could be using floating | |
183 // stack or fixed stack. | |
184 static bool is_floating_stack() { return _is_floating_stack; } | |
185 | |
186 static void libpthread_init(); | |
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187 static bool libnuma_init(); |
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188 static void* libnuma_dlsym(void* handle, const char* name); |
0 | 189 // Minimum stack size a thread can be created with (allowing |
190 // the VM to completely create the thread and enter user code) | |
191 static size_t min_stack_allowed; | |
192 | |
193 // Return default stack size or guard size for the specified thread type | |
194 static size_t default_stack_size(os::ThreadType thr_type); | |
195 static size_t default_guard_size(os::ThreadType thr_type); | |
196 | |
197 static void capture_initial_stack(size_t max_size); | |
198 | |
199 // Stack overflow handling | |
200 static bool manually_expand_stack(JavaThread * t, address addr); | |
201 static int max_register_window_saves_before_flushing(); | |
202 | |
203 // Real-time clock functions | |
204 static void clock_init(void); | |
205 | |
206 // fast POSIX clocks support | |
207 static void fast_thread_clock_init(void); | |
208 | |
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209 static inline bool supports_monotonic_clock() { |
0 | 210 return _clock_gettime != NULL; |
211 } | |
212 | |
213 static int clock_gettime(clockid_t clock_id, struct timespec *tp) { | |
214 return _clock_gettime ? _clock_gettime(clock_id, tp) : -1; | |
215 } | |
216 | |
217 static int pthread_getcpuclockid(pthread_t tid, clockid_t *clock_id) { | |
218 return _pthread_getcpuclockid ? _pthread_getcpuclockid(tid, clock_id) : -1; | |
219 } | |
220 | |
221 static bool supports_fast_thread_cpu_time() { | |
222 return _supports_fast_thread_cpu_time; | |
223 } | |
224 | |
225 static jlong fast_thread_cpu_time(clockid_t clockid); | |
226 | |
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227 // pthread_cond clock suppport |
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228 private: |
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229 static pthread_condattr_t _condattr[1]; |
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230 |
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231 public: |
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232 static pthread_condattr_t* condAttr() { return _condattr; } |
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233 |
0 | 234 // Stack repair handling |
235 | |
236 // none present | |
237 | |
238 // LinuxThreads work-around for 6292965 | |
239 static int safe_cond_timedwait(pthread_cond_t *_cond, pthread_mutex_t *_mutex, const struct timespec *_abstime); | |
240 | |
141 | 241 private: |
242 typedef int (*sched_getcpu_func_t)(void); | |
243 typedef int (*numa_node_to_cpus_func_t)(int node, unsigned long *buffer, int bufferlen); | |
244 typedef int (*numa_max_node_func_t)(void); | |
245 typedef int (*numa_available_func_t)(void); | |
246 typedef int (*numa_tonode_memory_func_t)(void *start, size_t size, int node); | |
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247 typedef void (*numa_interleave_memory_func_t)(void *start, size_t size, unsigned long *nodemask); |
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248 typedef void (*numa_set_bind_policy_func_t)(int policy); |
141 | 249 |
250 static sched_getcpu_func_t _sched_getcpu; | |
251 static numa_node_to_cpus_func_t _numa_node_to_cpus; | |
252 static numa_max_node_func_t _numa_max_node; | |
253 static numa_available_func_t _numa_available; | |
254 static numa_tonode_memory_func_t _numa_tonode_memory; | |
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255 static numa_interleave_memory_func_t _numa_interleave_memory; |
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256 static numa_set_bind_policy_func_t _numa_set_bind_policy; |
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257 static unsigned long* _numa_all_nodes; |
141 | 258 |
259 static void set_sched_getcpu(sched_getcpu_func_t func) { _sched_getcpu = func; } | |
260 static void set_numa_node_to_cpus(numa_node_to_cpus_func_t func) { _numa_node_to_cpus = func; } | |
261 static void set_numa_max_node(numa_max_node_func_t func) { _numa_max_node = func; } | |
262 static void set_numa_available(numa_available_func_t func) { _numa_available = func; } | |
263 static void set_numa_tonode_memory(numa_tonode_memory_func_t func) { _numa_tonode_memory = func; } | |
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264 static void set_numa_interleave_memory(numa_interleave_memory_func_t func) { _numa_interleave_memory = func; } |
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265 static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; } |
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266 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
3826 | 267 static int sched_getcpu_syscall(void); |
141 | 268 public: |
269 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } | |
270 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { | |
271 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; | |
272 } | |
273 static int numa_max_node() { return _numa_max_node != NULL ? _numa_max_node() : -1; } | |
274 static int numa_available() { return _numa_available != NULL ? _numa_available() : -1; } | |
275 static int numa_tonode_memory(void *start, size_t size, int node) { | |
276 return _numa_tonode_memory != NULL ? _numa_tonode_memory(start, size, node) : -1; | |
277 } | |
462
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278 static void numa_interleave_memory(void *start, size_t size) { |
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279 if (_numa_interleave_memory != NULL && _numa_all_nodes != NULL) { |
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280 _numa_interleave_memory(start, size, _numa_all_nodes); |
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281 } |
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282 } |
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283 static void numa_set_bind_policy(int policy) { |
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284 if (_numa_set_bind_policy != NULL) { |
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285 _numa_set_bind_policy(policy); |
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286 } |
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287 } |
141 | 288 static int get_node_by_cpu(int cpu_id); |
0 | 289 }; |
290 | |
291 | |
6197 | 292 class PlatformEvent : public CHeapObj<mtInternal> { |
0 | 293 private: |
294 double CachePad [4] ; // increase odds that _mutex is sole occupant of cache line | |
295 volatile int _Event ; | |
296 volatile int _nParked ; | |
297 pthread_mutex_t _mutex [1] ; | |
298 pthread_cond_t _cond [1] ; | |
299 double PostPad [2] ; | |
300 Thread * _Assoc ; | |
301 | |
302 public: // TODO-FIXME: make dtor private | |
303 ~PlatformEvent() { guarantee (0, "invariant") ; } | |
304 | |
305 public: | |
306 PlatformEvent() { | |
307 int status; | |
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308 status = pthread_cond_init (_cond, os::Linux::condAttr()); |
0 | 309 assert_status(status == 0, status, "cond_init"); |
310 status = pthread_mutex_init (_mutex, NULL); | |
311 assert_status(status == 0, status, "mutex_init"); | |
312 _Event = 0 ; | |
313 _nParked = 0 ; | |
314 _Assoc = NULL ; | |
315 } | |
316 | |
317 // Use caution with reset() and fired() -- they may require MEMBARs | |
318 void reset() { _Event = 0 ; } | |
319 int fired() { return _Event; } | |
320 void park () ; | |
321 void unpark () ; | |
322 int TryPark () ; | |
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323 int park (jlong millis) ; // relative timed-wait only |
0 | 324 void SetAssociation (Thread * a) { _Assoc = a ; } |
325 } ; | |
326 | |
6197 | 327 class PlatformParker : public CHeapObj<mtInternal> { |
0 | 328 protected: |
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329 enum { |
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330 REL_INDEX = 0, |
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331 ABS_INDEX = 1 |
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332 }; |
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333 int _cur_index; // which cond is in use: -1, 0, 1 |
0 | 334 pthread_mutex_t _mutex [1] ; |
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335 pthread_cond_t _cond [2] ; // one for relative times and one for abs. |
0 | 336 |
337 public: // TODO-FIXME: make dtor private | |
338 ~PlatformParker() { guarantee (0, "invariant") ; } | |
339 | |
340 public: | |
341 PlatformParker() { | |
342 int status; | |
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343 status = pthread_cond_init (&_cond[REL_INDEX], os::Linux::condAttr()); |
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344 assert_status(status == 0, status, "cond_init rel"); |
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345 status = pthread_cond_init (&_cond[ABS_INDEX], NULL); |
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346 assert_status(status == 0, status, "cond_init abs"); |
0 | 347 status = pthread_mutex_init (_mutex, NULL); |
348 assert_status(status == 0, status, "mutex_init"); | |
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349 _cur_index = -1; // mark as unused |
0 | 350 } |
10405 | 351 }; |
1972 | 352 |
353 #endif // OS_LINUX_VM_OS_LINUX_HPP |