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author | Tristan Gingold <tgingold@free.fr> | 2014-11-04 20:14:19 +0100 |
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committer | Tristan Gingold <tgingold@free.fr> | 2014-11-04 20:14:19 +0100 |
commit | 9c195bf5d86d67ea5eb419ccf6e48dc153e57c68 (patch) | |
tree | 575346e529b99e26382b4a06f6ff2caa0b391ab2 /src/ortho/mcode/memsegs_c.c | |
parent | 184a123f91e07c927292d67462561dc84f3a920d (diff) | |
download | ghdl-9c195bf5d86d67ea5eb419ccf6e48dc153e57c68.tar.gz ghdl-9c195bf5d86d67ea5eb419ccf6e48dc153e57c68.tar.bz2 ghdl-9c195bf5d86d67ea5eb419ccf6e48dc153e57c68.zip |
Move sources to src/ subdirectory.
Diffstat (limited to 'src/ortho/mcode/memsegs_c.c')
-rw-r--r-- | src/ortho/mcode/memsegs_c.c | 133 |
1 files changed, 133 insertions, 0 deletions
diff --git a/src/ortho/mcode/memsegs_c.c b/src/ortho/mcode/memsegs_c.c new file mode 100644 index 000000000..f0a0e27d5 --- /dev/null +++ b/src/ortho/mcode/memsegs_c.c @@ -0,0 +1,133 @@ +/* Memory segment handling. + Copyright (C) 2006 Tristan Gingold. + + GHDL is free software; you can redistribute it and/or modify it under + the terms of the GNU General Public License as published by the Free + Software Foundation; either version 2, or (at your option) any later + version. + + GHDL is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + for more details. + + You should have received a copy of the GNU General Public License + along with GCC; see the file COPYING. If not, write to the Free + Software Foundation, 59 Temple Place - Suite 330, Boston, MA + 02111-1307, USA. +*/ +#ifndef WINNT + +#define _GNU_SOURCE +#include <sys/mman.h> +#include <stddef.h> +/* #include <stdio.h> */ + +/* TODO: init (get pagesize) + round size, + set rights. +*/ + +#ifdef __APPLE__ +#define MAP_ANONYMOUS MAP_ANON +#else +#define HAVE_MREMAP +#endif + +#ifndef HAVE_MREMAP +#include <string.h> +#endif + +void * +mmap_malloc (int size) +{ + void *res; + res = mmap (NULL, size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + /* printf ("mmap (%d) = %p\n", size, res); */ + if (res == MAP_FAILED) + return NULL; + return res; +} + +void * +mmap_realloc (void *ptr, int old_size, int size) +{ + void *res; +#ifdef HAVE_MREMAP + res = mremap (ptr, old_size, size, MREMAP_MAYMOVE); +#else + res = mmap (NULL, size, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (res == MAP_FAILED) + return NULL; + memcpy (res, ptr, old_size); + munmap (ptr, old_size); +#endif + /* printf ("mremap (%p, %d, %d) = %p\n", ptr, old_size, size, res); */ +#if 0 + if (res == MAP_FAILED) + return NULL; +#endif + return res; +} + +void +mmap_free (void * ptr, int size) +{ + munmap (ptr, size); +} + +void +mmap_rx (void *ptr, int size) +{ + mprotect (ptr, size, PROT_READ | PROT_EXEC); +} + +#else +#include <windows.h> + +void * +mmap_malloc (int size) +{ + void *res; + res = VirtualAlloc (NULL, size, + MEM_COMMIT | MEM_RESERVE, + PAGE_READWRITE); + return res; +} + +void * +mmap_realloc (void *ptr, int old_size, int size) +{ + void *res; + + res = VirtualAlloc (NULL, size, + MEM_COMMIT | MEM_RESERVE, + PAGE_READWRITE); + + if (ptr != NULL) + { + CopyMemory (res, ptr, size > old_size ? old_size : size); + VirtualFree (ptr, old_size, MEM_RELEASE); + } + + return res; +} + +void +mmap_free (void * ptr, int size) +{ + VirtualFree (ptr, size, MEM_RELEASE); +} + +void +mmap_rx (void *ptr, int size) +{ + DWORD old; + + /* This is not supported on every version. + In case of failure, this should still work. */ + VirtualProtect (ptr, size, PAGE_EXECUTE_READ, &old); +} +#endif |