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authortwinaphex2014-12-13 05:53:54 +0100
committernotaz2014-12-20 20:43:39 +0200
commitce0e7ac9c11993f9165615dec870c50e1c3b39bf (patch)
tree629b0c946cab1a27a3624299c6b09a691ee47a40 /libpcsxcore
parent1e1cccd9ef788b3582002283f6cb7e48db53677f (diff)
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psxmem: Add mman wrapper for Win32 and use it for PCSX ReARmed libretro Win32
Conflicts: Makefile.libretro
Diffstat (limited to 'libpcsxcore')
-rw-r--r--libpcsxcore/memmap.h56
-rw-r--r--libpcsxcore/memmap_win32.c173
-rw-r--r--libpcsxcore/psxmem.c3
3 files changed, 231 insertions, 1 deletions
diff --git a/libpcsxcore/memmap.h b/libpcsxcore/memmap.h
new file mode 100644
index 0000000..ad56f04
--- /dev/null
+++ b/libpcsxcore/memmap.h
@@ -0,0 +1,56 @@
+#ifndef _MEMMAP_H
+#define _MEMMAP_H
+
+#ifdef _WIN32
+
+#ifndef _WIN32_WINNT // Allow use of features specific to Windows XP or later.
+#define _WIN32_WINNT 0x0501 // Change this to the appropriate value to target other versions of Windows.
+#endif
+
+/* All the headers include this file. */
+#ifndef _MSC_VER
+#include <_mingw.h>
+#endif
+
+#include <sys/types.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define PROT_NONE 0
+#define PROT_READ 1
+#define PROT_WRITE 2
+#define PROT_EXEC 4
+
+#define MAP_FILE 0
+#define MAP_SHARED 1
+#define MAP_PRIVATE 2
+#define MAP_TYPE 0xf
+#define MAP_FIXED 0x10
+#define MAP_ANONYMOUS 0x20
+#define MAP_ANON MAP_ANONYMOUS
+
+#define MAP_FAILED ((void *)-1)
+
+/* Flags for msync. */
+#define MS_ASYNC 1
+#define MS_SYNC 2
+#define MS_INVALIDATE 4
+
+void* mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off);
+int munmap(void *addr, size_t len);
+int mprotect(void *addr, size_t len, int prot);
+int msync(void *addr, size_t len, int flags);
+int mlock(const void *addr, size_t len);
+int munlock(const void *addr, size_t len);
+
+#ifdef __cplusplus
+};
+#endif
+
+#else
+#include <sys/mman.h>
+#endif
+
+#endif
diff --git a/libpcsxcore/memmap_win32.c b/libpcsxcore/memmap_win32.c
new file mode 100644
index 0000000..f4dbdd6
--- /dev/null
+++ b/libpcsxcore/memmap_win32.c
@@ -0,0 +1,173 @@
+#include <windows.h>
+#include <errno.h>
+#include <io.h>
+
+#include "mman.h"
+
+#ifndef FILE_MAP_EXECUTE
+#define FILE_MAP_EXECUTE 0x0020
+#endif /* FILE_MAP_EXECUTE */
+
+static int __map_mman_error(const DWORD err, const int deferr)
+{
+ if (err == 0)
+ return 0;
+ /* TODO: implement */
+ return err;
+}
+
+static DWORD __map_mmap_prot_page(const int prot)
+{
+ DWORD protect = 0;
+
+ if (prot == PROT_NONE)
+ return 0;
+
+ if ((prot & PROT_EXEC) != 0)
+ protect = ((prot & PROT_WRITE) != 0) ?
+ PAGE_EXECUTE_READWRITE : PAGE_EXECUTE_READ;
+ else
+ protect = ((prot & PROT_WRITE) != 0) ?
+ PAGE_READWRITE : PAGE_READONLY;
+
+ return protect;
+}
+
+static DWORD __map_mmap_prot_file(const int prot)
+{
+ DWORD desiredAccess = 0;
+
+ if (prot == PROT_NONE)
+ return 0;
+
+ if ((prot & PROT_READ) != 0)
+ desiredAccess |= FILE_MAP_READ;
+ if ((prot & PROT_WRITE) != 0)
+ desiredAccess |= FILE_MAP_WRITE;
+ if ((prot & PROT_EXEC) != 0)
+ desiredAccess |= FILE_MAP_EXECUTE;
+
+ return desiredAccess;
+}
+
+void* mmap(void *addr, size_t len, int prot, int flags, int fildes, off_t off)
+{
+ HANDLE fm, h;
+
+ void * map = MAP_FAILED;
+
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable: 4293)
+#endif
+
+ const DWORD dwFileOffsetLow = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)off : (DWORD)(off & 0xFFFFFFFFL);
+ const DWORD dwFileOffsetHigh = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)0 : (DWORD)((off >> 32) & 0xFFFFFFFFL);
+ const DWORD protect = __map_mmap_prot_page(prot);
+ const DWORD desiredAccess = __map_mmap_prot_file(prot);
+
+ const off_t maxSize = off + (off_t)len;
+
+ const DWORD dwMaxSizeLow = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)maxSize : (DWORD)(maxSize & 0xFFFFFFFFL);
+ const DWORD dwMaxSizeHigh = (sizeof(off_t) <= sizeof(DWORD)) ?
+ (DWORD)0 : (DWORD)((maxSize >> 32) & 0xFFFFFFFFL);
+
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+ errno = 0;
+
+ if (len == 0
+ /* Unsupported flag combinations */
+ || (flags & MAP_FIXED) != 0
+ /* Usupported protection combinations */
+ || prot == PROT_EXEC)
+ {
+ errno = EINVAL;
+ return MAP_FAILED;
+ }
+
+ h = ((flags & MAP_ANONYMOUS) == 0) ?
+ (HANDLE)_get_osfhandle(fildes) : INVALID_HANDLE_VALUE;
+
+ if ((flags & MAP_ANONYMOUS) == 0 && h == INVALID_HANDLE_VALUE)
+ {
+ errno = EBADF;
+ return MAP_FAILED;
+ }
+
+ fm = CreateFileMapping(h, NULL, protect, dwMaxSizeHigh, dwMaxSizeLow, NULL);
+
+ if (!fm)
+ goto error;
+
+ map = MapViewOfFile(fm, desiredAccess, dwFileOffsetHigh, dwFileOffsetLow, len);
+
+ CloseHandle(fm);
+
+ if (!map)
+ goto error;
+
+ return map;
+error:
+ errno = __map_mman_error(GetLastError(), EPERM);
+ return MAP_FAILED;
+}
+
+int munmap(void *addr, size_t len)
+{
+ if (UnmapViewOfFile(addr))
+ return 0;
+
+ errno = __map_mman_error(GetLastError(), EPERM);
+
+ return -1;
+}
+
+int mprotect(void *addr, size_t len, int prot)
+{
+ DWORD newProtect = __map_mmap_prot_page(prot);
+ DWORD oldProtect = 0;
+
+ if (VirtualProtect(addr, len, newProtect, &oldProtect))
+ return 0;
+
+ errno = __map_mman_error(GetLastError(), EPERM);
+
+ return -1;
+}
+
+int msync(void *addr, size_t len, int flags)
+{
+ if (FlushViewOfFile(addr, len))
+ return 0;
+
+ errno = __map_mman_error(GetLastError(), EPERM);
+
+ return -1;
+}
+
+int mlock(const void *addr, size_t len)
+{
+ if (VirtualLock((LPVOID)addr, len))
+ return 0;
+
+ errno = __map_mman_error(GetLastError(), EPERM);
+
+ return -1;
+}
+
+int munlock(const void *addr, size_t len)
+{
+ if (VirtualUnlock((LPVOID)addr, len))
+ return 0;
+
+ errno = __map_mman_error(GetLastError(), EPERM);
+
+ return -1;
+}
+
diff --git a/libpcsxcore/psxmem.c b/libpcsxcore/psxmem.c
index 7001744..86da68c 100644
--- a/libpcsxcore/psxmem.c
+++ b/libpcsxcore/psxmem.c
@@ -28,7 +28,8 @@
#include "r3000a.h"
#include "psxhw.h"
#include "debug.h"
-#include <sys/mman.h>
+
+#include "memmap.h"
#ifndef MAP_ANONYMOUS
#define MAP_ANONYMOUS MAP_ANON