254 // then you bind processes according to that distribution.
255 // Compute a distribution for number of processes to processors.
256 // Stores the processor id's into the distribution array argument.
257 // Returns true if it worked, false if it didn't.
258 static bool distribute_processes(uint length, uint* distribution);
259 // Binds the current process to a processor.
260 // Returns true if it worked, false if it didn't.
261 static bool bind_to_processor(uint processor_id);
262
263 // Give a name to the current thread.
264 static void set_native_thread_name(const char *name);
265
266 // Interface for stack banging (predetect possible stack overflow for
267 // exception processing) There are guard pages, and above that shadow
268 // pages for stack overflow checking.
269 static bool uses_stack_guard_pages();
270 static bool must_commit_stack_guard_pages();
271 static void map_stack_shadow_pages(address sp);
272 static bool stack_shadow_pages_available(Thread *thread, const methodHandle& method, address sp);
273
274 // OS interface to Virtual Memory
275
276 // Return the default page size.
277 static int vm_page_size();
278
279 // Returns the page size to use for a region of memory.
280 // region_size / min_pages will always be greater than or equal to the
281 // returned value. The returned value will divide region_size.
282 static size_t page_size_for_region_aligned(size_t region_size, size_t min_pages);
283
284 // Returns the page size to use for a region of memory.
285 // region_size / min_pages will always be greater than or equal to the
286 // returned value. The returned value might not divide region_size.
287 static size_t page_size_for_region_unaligned(size_t region_size, size_t min_pages);
288
289 // Return the largest page size that can be used
290 static size_t max_page_size() {
291 // The _page_sizes array is sorted in descending order.
292 return _page_sizes[0];
293 }
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254 // then you bind processes according to that distribution.
255 // Compute a distribution for number of processes to processors.
256 // Stores the processor id's into the distribution array argument.
257 // Returns true if it worked, false if it didn't.
258 static bool distribute_processes(uint length, uint* distribution);
259 // Binds the current process to a processor.
260 // Returns true if it worked, false if it didn't.
261 static bool bind_to_processor(uint processor_id);
262
263 // Give a name to the current thread.
264 static void set_native_thread_name(const char *name);
265
266 // Interface for stack banging (predetect possible stack overflow for
267 // exception processing) There are guard pages, and above that shadow
268 // pages for stack overflow checking.
269 static bool uses_stack_guard_pages();
270 static bool must_commit_stack_guard_pages();
271 static void map_stack_shadow_pages(address sp);
272 static bool stack_shadow_pages_available(Thread *thread, const methodHandle& method, address sp);
273
274 // Find committed memory region within specified range (start, start + size),
275 // return true if found any
276 static bool committed_in_range(address start, size_t size, address& committed_start, size_t& committed_size);
277
278 // OS interface to Virtual Memory
279
280 // Return the default page size.
281 static int vm_page_size();
282
283 // Returns the page size to use for a region of memory.
284 // region_size / min_pages will always be greater than or equal to the
285 // returned value. The returned value will divide region_size.
286 static size_t page_size_for_region_aligned(size_t region_size, size_t min_pages);
287
288 // Returns the page size to use for a region of memory.
289 // region_size / min_pages will always be greater than or equal to the
290 // returned value. The returned value might not divide region_size.
291 static size_t page_size_for_region_unaligned(size_t region_size, size_t min_pages);
292
293 // Return the largest page size that can be used
294 static size_t max_page_size() {
295 // The _page_sizes array is sorted in descending order.
296 return _page_sizes[0];
297 }
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