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#ifndef _OS_H_
#define _OS_H_
#define DPRINTF(t,a) { if (t) fprintf a; }
#ifdef DARWIN
#include "Darwin-os.h"
#else
#ifdef MACH
#include "mach-os.h"
#else
#ifdef sun
#include "sunos-os.h"
#ifdef __OpenBSD__
#include "OpenBSD-os.h"
#else
#ifdef __NetBSD__
#include "NetBSD-os.h"
#else
#define os_context_t struct sigcontext
#endif
#define HANDLER_ARGS int signal, int code, os_context_t *context
#endif
#ifndef CODE
#define CODE(code) code
#endif
#ifndef SAVE_CONTEXT
#define SAVE_CONTEXT() do {} while(0)
#endif
#ifndef RESTORE_FPU
#define RESTORE_FPU(context) do {} while (0)
#endif
#define OS_VM_PROT_ALL (OS_VM_PROT_READ|OS_VM_PROT_WRITE|OS_VM_PROT_EXECUTE)
extern os_vm_size_t os_vm_page_size;
extern void os_init0(const char *argv[], const char *envp[]);
extern void os_install_interrupt_handlers(void);
extern os_vm_address_t os_allocate(os_vm_size_t len);
extern os_vm_address_t os_allocate_at(os_vm_address_t addr, os_vm_size_t len);
extern os_vm_address_t os_reallocate(os_vm_address_t addr,
os_vm_size_t old_len, os_vm_size_t len);
extern void os_deallocate(os_vm_address_t addr, os_vm_size_t len);
extern void os_zero(os_vm_address_t addr, os_vm_size_t length);
extern os_vm_address_t os_validate(os_vm_address_t addr, os_vm_size_t len);
extern void os_invalidate(os_vm_address_t addr, os_vm_size_t len);
extern os_vm_address_t os_map(int fd, int offset, os_vm_address_t addr,
os_vm_size_t len);
extern void os_flush_icache(os_vm_address_t addr, os_vm_size_t len);
extern void os_protect(os_vm_address_t addr, os_vm_size_t len,
os_vm_prot_t protection);
extern boolean valid_addr(os_vm_address_t test);
#define os_trunc_to_page(addr) \
(os_vm_address_t)(((long)(addr))&~(os_vm_page_size-1))
#define os_round_up_to_page(addr) \
os_trunc_to_page((addr)+(os_vm_page_size-1))
#define os_trunc_size_to_page(size) \
(os_vm_size_t)(((long)(size))&~(os_vm_page_size-1))
#define os_round_up_size_to_page(size) \
os_trunc_size_to_page((size)+(os_vm_page_size-1))
extern void *os_dlsym(const char *sym_name, lispobj lib_list);
enum stack_zone_t { BOTH_ZONES, YELLOW_ZONE, RED_ZONE };
extern int os_stack_grows_down(void);
extern void os_guard_control_stack(int zone, int guard);
extern int os_control_stack_overflow(void *, os_context_t *);
unsigned long *os_sigcontext_reg(ucontext_t *, int);
unsigned long *os_sigcontext_pc(ucontext_t *);
unsigned char *os_sigcontext_fpu_reg(ucontext_t *, int);
unsigned int os_sigcontext_fpu_modes(ucontext_t *);
char* convert_lisp_string(char* c_string, void* lisp_string, int len);
#endif /* _OS_H_ */