Thanks for the work! Could you please add MAP_POPULATE too? 2017年11月24日 下午11:55，"Matt Wette" 写道： > > > > > > I did a little more on this. Here is the latest. > It provides mmap (not searched) and mmap/search (searched for pointers to > GC). > > > --- libguile/filesys.c.orig 2017-03-01 10:54:31.000000000 -0800 > +++ libguile/filesys.c 2017-10-28 10:05:10.000000000 -0700 > @@ -1828,9 +1828,14 @@ > > > > +#include "mman.c" > + > void > scm_init_filesys () > { > +#ifdef HAVE_SYS_MMAN_H > + init_mman(); > +#endif > #ifdef HAVE_POSIX > scm_tc16_dir = scm_make_smob_type ("directory", 0); > scm_set_smob_free (scm_tc16_dir, scm_dir_free); > --- libguile/mman.c.orig 2017-10-28 10:05:10.000000000 -0700 > +++ libguile/mman.c 2017-11-04 09:23:35.000000000 -0700 > @@ -0,0 +1,199 @@ > +// mman.c - v171104a > +#ifdef HAVE_CONFIG_H > +# include > +#endif > + > +#ifdef HAVE_SYS_MMAN_H > +# include > +# include > +#endif > + > +#if defined(HAVE_SYS_MMAN_H) && defined(HAVE_MAP_ANONYMOUS) > + > +#include "libguile/_scm.h" > +#include "libguile/smob.h" > +#include "libguile/fdes-finalizers.h" > +#include "libguile/feature.h" > + > +SCM_API SCM scm_mmap_search (SCM addr, SCM len, SCM prot, SCM flags, SCM > fd, > + SCM offset); > +SCM_API SCM scm_mmap (SCM addr, SCM len, SCM prot, SCM flags, SCM fd, > + SCM offset); > +SCM_API SCM scm_munmap (SCM bvec); > +void init_mman(void); > +static void mmap_finalizer (void *ptr, void *data); > + > +SCM_DEFINE (scm_mmap_search, "mmap/search", 2, 4, 0, > + (SCM addr, SCM len, SCM prot, SCM flags, SCM fd, SCM offset), > + "mmap addr len [prot [flags [fd [offset]]]]" > + "See the unix man page for mmap. Returns a bytevector." > + "Note that the region allocated will be searched by the > garbage" > + "collector for pointers. \n" > + " Defaults:\n" > + " PROT (logior PROT_READ PROT_WRITE)\n" > + " FLAGS (logior MAP_ANON MAP_PRIVATE)\n" > + " FD -1\n" > + " OFFSET 0\n" > + "@example\n(define reg (mmap/search %null-pointer #x1000)\n" > + "@end example" > + ) > +#define FUNC_NAME s_scm_mmap_search > +{ > + void *c_mem, *c_addr; > + size_t c_len; > + int c_prot, c_flags, c_fd; > + scm_t_off c_offset; > + SCM pointer, bvec; > + > + if (SCM_POINTER_P (addr)) > + c_addr = SCM_POINTER_VALUE (addr); > + else if (scm_is_integer (addr)) > + c_addr = (void*) scm_to_uintptr_t (addr); > + else > + SCM_MISC_ERROR("bad addr", addr); > + > + c_len = scm_to_size_t (len); > + > + if (SCM_UNBNDP (prot)) > + c_prot = PROT_READ | PROT_WRITE; > + else > + c_prot = scm_to_int (prot); > + > + if (SCM_UNBNDP (flags)) > + c_flags = MAP_ANON | MAP_PRIVATE; > + else > + c_flags = scm_to_int (flags); > + > + if (SCM_UNBNDP (fd)) > + c_fd = -1; > + else > + c_fd = scm_to_int (fd); > + > + if (SCM_UNBNDP (fd)) > + c_offset = 0; > + else > + c_offset = scm_to_off_t (offset); > + > + c_mem = mmap(c_addr, c_len, c_prot, c_flags, c_fd, c_offset); > + if (c_mem == MAP_FAILED) > + SCM_SYSERROR; /* errno set */ > + > + pointer = scm_cell (scm_tc7_pointer, (scm_t_bits) c_mem); > + bvec = scm_c_take_typed_bytevector((signed char *) c_mem + c_offset, > c_len, > + SCM_ARRAY_ELEMENT_TYPE_VU8, pointer); > + /* if sizeof(void*) < sizeof(size_t) we are in trouble: */ > + scm_i_set_finalizer (SCM2PTR (bvec), mmap_finalizer, (void*) c_len); > + return bvec; > +} > +#undef FUNC_NAME > + > +SCM_DEFINE (scm_mmap, "mmap", 2, 4, 0, > + (SCM addr, SCM len, SCM prot, SCM flags, SCM fd, SCM offset), > + "mmap addr len [prot [flags [fd [offset]]]]" > + "See the man page. Returns a bytevector." > + "Note that the region returned by mmap will NOT be searched " > + "by the garbage collector for pointers.\n" > + "Defaults:\n" > + " PROT (logior PROT_READ PROT_WRITE)\n" > + " FLAGS (logior MAP_ANON MAP_PRIVATE)\n" > + " FD -1\n" > + " OFFSET 0\n" > + "@example\n" > + "(define bvec-1MB (mmap 0 #x100000)\n" > + "@end example" > + ) > +#define FUNC_NAME s_scm_mmap > +{ > + SCM bvec; > + void *c_mem; > + size_t c_len; > + > + bvec = scm_mmap_search(addr, len, prot, flags, fd, offset); > + c_mem = SCM_BYTEVECTOR_CONTENTS(bvec); > + c_len = SCM_BYTEVECTOR_LENGTH(bvec); > + > + /* tell GC not to scan for pointers */ > + GC_exclude_static_roots(c_mem, (char*) c_mem + c_len); > + > + return bvec; > +} > +static void > +mmap_finalizer (void *ptr, void *data) > +{ > + void *c_addr; > + intptr_t c_len; > + int res; > + > + c_addr = (void *) SCM_POINTER_VALUE (SCM_PACK_POINTER (ptr)); > + c_len = (intptr_t) data; > + res = munmap(c_addr, c_len); > + if (res != 0) SCM_SYSERROR; > +} > +#undef FUNC_NAME > + > +SCM_DEFINE (scm_munmap, "munmap", 1, 0, 0, > + (SCM bvec), > + "See the man page. Given bytevector unmap." > + ) > +#define FUNC_NAME s_scm_munmap > +{ > + void *c_addr; > + size_t c_len; > + int c_res; > + > + SCM_VALIDATE_BYTEVECTOR (1, bvec); > + > + c_addr = (void *) SCM_BYTEVECTOR_CONTENTS (bvec); > + c_len = SCM_BYTEVECTOR_LENGTH (bvec); > + > + c_res = munmap(c_addr, c_len); > + if (c_res == -1) > + SCM_SYSERROR; /* errno set */ > + > + // TODO: clean up bytevector > + return SCM_UNSPECIFIED; > +} > +#undef FUNC_NAME > + > +void init_mman(void) { > +#ifdef PROT_NONE > + scm_c_define ("PROT_NONE", scm_from_int (PROT_NONE)); > +#endif > +#ifdef PROT_ > + scm_c_define ("PROT_READ", scm_from_int (PROT_READ)); > +#endif > +#ifdef PROT_ > + scm_c_define ("PROT_WRITE", scm_from_int (PROT_WRITE)); > +#endif > +#ifdef PROT_ > + scm_c_define ("PROT_EXEC", scm_from_int (PROT_EXEC)); > +#endif > + > +#ifdef MAP_ANONYMOUS > + scm_c_define ("MAP_ANONYMOUS", scm_from_int (MAP_ANONYMOUS)); > +#endif > +#ifdef MAP_ANON > + scm_c_define ("MAP_ANON", scm_from_int (MAP_ANON)); > +#endif > +#ifdef MAP_FILE > + scm_c_define ("MAP_FILE", scm_from_int (MAP_FILE)); > +#endif > +#ifdef MAP_FIXED > + scm_c_define ("MAP_FIXED", scm_from_int (MAP_FIXED)); > +#endif > +#ifdef MAP_HASSEMAPHORE > + scm_c_define ("MAP_HASSEMAPHORE", scm_from_int (MAP_HASSEMAPHORE)); > +#endif > +#ifdef MAP_PRIVATE > + scm_c_define ("MAP_PRIVATE", scm_from_int (MAP_PRIVATE)); > +#endif > +#ifdef MAP_SHARED > + scm_c_define ("MAP_SHARED", scm_from_int (MAP_SHARED)); > +#endif > +#ifdef MAP_NOCACHE > + scm_c_define ("MAP_NOCACHE", scm_from_int (MAP_NOCACHE)); > +#endif > + scm_c_define ("PAGE_SIZE", scm_from_int (getpagesize())); > +} > + > +#endif /* HAVE_SYS_MMAN_H */ > > > > >