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[Ada] Fix incorrect binding to MapViewOfFile in s-win32.ads 

Despite the "dw" prefix on the name, the dwNumberOfBytesToMap argument
to MapViewOfFile was changed from DWORD to SIZE_T when 64bit Windows
came about.

This change adjusts the binding we have for it in System.Win32
accordingly. For consistency with established practice, an s-win32
specific version of size_t is introduced and g-sercom__mingw.adb is
adjusted to disambiguate between this new size_t and the one already
exposed in System.CRTL.

2019-08-13  Olivier Hainque  <hainque@adacore.com>

gcc/ada/

	* libgnat/s-win32.ads: Define size_t and fix the MapViewOfFile
	binding to use it instead of DWORD for the dwNumberOfBytesToMap
	argument.
	* libgnat/g-sercom__mingw.adb (Read): State which definition of
	size_t to fetch in call to Last_Index.

From-SVN: r274341
This commit is contained in:
Olivier Hainque 2019-08-13 08:07:08 +00:00 committed by Pierre-Marie de Rodat
parent 07c6ed01a7
commit 3fee1dcfc7
3 changed files with 11 additions and 2 deletions
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8
gcc/ada/ChangeLog
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@ -1,3 +1,11 @@
2019-08-13 Olivier Hainque <hainque@adacore.com>
* libgnat/s-win32.ads: Define size_t and fix the MapViewOfFile
binding to use it instead of DWORD for the dwNumberOfBytesToMap
argument.
* libgnat/g-sercom__mingw.adb (Read): State which definition of
size_t to fetch in call to Last_Index.
2019-08-13 Arnaud Charlet <charlet@adacore.com>
* gcc-interface/Make-lang.in: Remove unused TRACE variable. Pass

2
gcc/ada/libgnat/g-sercom__mingw.adb
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@ -167,7 +167,7 @@ package body GNAT.Serial_Communications is
Raise_Error ("read error");
end if;
Last := Last_Index (Buffer'First, size_t (Read_Last));
Last := Last_Index (Buffer'First, CRTL.size_t (Read_Last));
end Read;
---------

3
gcc/ada/libgnat/s-win32.ads
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@ -63,6 +63,7 @@ package System.Win32 is
type BYTE is new Interfaces.C.unsigned_char;
type LONG is new Interfaces.C.long;
type CHAR is new Interfaces.C.char;
type SIZE_T is new Interfaces.C.size_t;
type BOOL is new Interfaces.C.int;
for BOOL'Size use Interfaces.C.int'Size;
@ -238,7 +239,7 @@ package System.Win32 is
dwDesiredAccess : DWORD;
dwFileOffsetHigh : DWORD;
dwFileOffsetLow : DWORD;
dwNumberOfBytesToMap : DWORD) return System.Address;
dwNumberOfBytesToMap : SIZE_T) return System.Address;
pragma Import (Stdcall, MapViewOfFile, "MapViewOfFile");
function UnmapViewOfFile (lpBaseAddress : System.Address) return BOOL;