204 lines
5.2 KiB
C
204 lines
5.2 KiB
C
/* runtime.h -- runtime support for Go.
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include "config.h"
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#define _GNU_SOURCE
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#include "go-assert.h"
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <pthread.h>
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#include <semaphore.h>
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#ifdef HAVE_SYS_MMAN_H
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#include <sys/mman.h>
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#endif
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#include "go-alloc.h"
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#include "go-panic.h"
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#include "go-string.h"
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typedef struct __go_string String;
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/* This file supports C files copied from the 6g runtime library.
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This is a version of the 6g runtime.h rewritten for gccgo's version
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of the code. */
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typedef signed int int8 __attribute__ ((mode (QI)));
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typedef unsigned int uint8 __attribute__ ((mode (QI)));
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typedef signed int int16 __attribute__ ((mode (HI)));
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typedef unsigned int uint16 __attribute__ ((mode (HI)));
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typedef signed int int32 __attribute__ ((mode (SI)));
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typedef unsigned int uint32 __attribute__ ((mode (SI)));
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typedef signed int int64 __attribute__ ((mode (DI)));
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typedef unsigned int uint64 __attribute__ ((mode (DI)));
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typedef float float32 __attribute__ ((mode (SF)));
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typedef double float64 __attribute__ ((mode (DF)));
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typedef unsigned int uintptr __attribute__ ((mode (pointer)));
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/* Defined types. */
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typedef uint8 bool;
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typedef uint8 byte;
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typedef struct M M;
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typedef struct MCache MCache;
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typedef struct Lock Lock;
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/* We use mutexes for locks. 6g uses futexes directly, and perhaps
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someday we will do that too. */
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struct Lock
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{
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uint32 key;
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sem_t sem;
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};
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/* A Note. */
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typedef struct Note Note;
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struct Note {
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int32 woken;
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};
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/* Per CPU declarations. */
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#ifdef __rtems__
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#define __thread
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#endif
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extern __thread M* m;
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extern M m0;
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#ifdef __rtems__
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#undef __thread
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#endif
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/* Constants. */
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enum
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{
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true = 1,
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false = 0,
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};
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/* Structures. */
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struct M
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{
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int32 mallocing;
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int32 gcing;
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int32 locks;
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int32 nomemprof;
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int32 gcing_for_prof;
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int32 holds_finlock;
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int32 gcing_for_finlock;
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int32 profilehz;
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MCache *mcache;
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/* For the list of all threads. */
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struct __go_thread_id *list_entry;
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/* For the garbage collector. */
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void *gc_sp;
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size_t gc_len;
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void *gc_next_segment;
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void *gc_next_sp;
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void *gc_initial_sp;
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struct __go_panic_defer_struct *gc_panic_defer;
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};
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/* Macros. */
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#define nelem(x) (sizeof(x)/sizeof((x)[0]))
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#define nil ((void*)0)
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#define USED(v) ((void) v)
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/* We map throw to assert. */
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#define runtime_throw(s) __go_assert(s == 0)
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void* runtime_mal(uintptr);
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void runtime_mallocinit(void);
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void runtime_initfintab(void);
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void siginit(void);
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bool __go_sigsend(int32 sig);
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int64 runtime_nanotime(void);
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void runtime_stoptheworld(void);
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void runtime_starttheworld(void);
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void __go_go(void (*pfn)(void*), void*);
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void __go_gc_goroutine_init(void*);
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void __go_enable_gc(void);
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int __go_run_goroutine_gc(int);
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void __go_scanstacks(void (*scan)(byte *, int64));
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void __go_stealcache(void);
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void __go_cachestats(void);
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/*
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* mutual exclusion locks. in the uncontended case,
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* as fast as spin locks (just a few user-level instructions),
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* but on the contention path they sleep in the kernel.
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*/
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void runtime_initlock(Lock*);
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void runtime_lock(Lock*);
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void runtime_unlock(Lock*);
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void runtime_destroylock(Lock*);
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void semacquire (uint32 *) asm ("libgo_runtime.runtime.Semacquire");
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void semrelease (uint32 *) asm ("libgo_runtime.runtime.Semrelease");
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/*
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* sleep and wakeup on one-time events.
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* before any calls to notesleep or notewakeup,
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* must call noteclear to initialize the Note.
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* then, any number of threads can call notesleep
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* and exactly one thread can call notewakeup (once).
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* once notewakeup has been called, all the notesleeps
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* will return. future notesleeps will return immediately.
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*/
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void runtime_noteclear(Note*);
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void runtime_notesleep(Note*);
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void runtime_notewakeup(Note*);
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/* Functions. */
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#define runtime_printf printf
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#define runtime_malloc(s) __go_alloc(s)
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#define runtime_free(p) __go_free(p)
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#define runtime_memclr(buf, size) __builtin_memset((buf), 0, (size))
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#define runtime_strcmp(s1, s2) __builtin_strcmp((s1), (s2))
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#define runtime_getenv(s) getenv(s)
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#define runtime_atoi(s) atoi(s)
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#define runtime_mcmp(a, b, s) __builtin_memcmp((a), (b), (s))
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#define runtime_memmove(a, b, s) __builtin_memmove((a), (b), (s))
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MCache* runtime_allocmcache(void);
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void free(void *v);
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struct __go_func_type;
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void runtime_addfinalizer(void*, void(*fn)(void*), const struct __go_func_type *);
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void runtime_walkfintab(void (*fn)(void*), void (*scan)(byte *, int64));
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#define runtime_mmap mmap
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#define runtime_munmap(p, s) munmap((p), (s))
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#define runtime_cas(pval, old, new) __sync_bool_compare_and_swap (pval, old, new)
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#define runtime_casp(pval, old, new) __sync_bool_compare_and_swap (pval, old, new)
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void runtime_sigprof(uint8 *pc, uint8 *sp, uint8 *lr);
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void runtime_cpuprofinit(void);
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void runtime_resetcpuprofiler(int32);
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void runtime_setcpuprofilerate(void(*)(uintptr*, int32), int32);
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struct __go_func_type;
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void reflect_call(const struct __go_func_type *, const void *, _Bool, _Bool,
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void **, void **)
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asm ("libgo_reflect.reflect.call");
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#ifdef __rtems__
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void __wrap_rtems_task_variable_add(void **);
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#endif
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