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Wrap the Windows-specific code in _MSC_VER

This commit is contained in:
tomcw 2024-03-29 21:07:48 +00:00
parent d9e68e9cdd
commit 2d9f89f28c
1 changed files with 19 additions and 4 deletions
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23
source/Memory.cpp
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@ -241,6 +241,10 @@ static LPBYTE RWpages[kMaxExMemoryBanks]; // pointers to RW memory banks
static const UINT kNumAnnunciators = 4;
static bool g_Annunciator[kNumAnnunciators] = {};
#ifdef _MSC_VER
static HANDLE g_hMemImage = NULL; // NB. When not initialised, this handle is NULL (not INVALID_HANDLE_VALUE)
#endif
BYTE __stdcall IO_Annunciator(WORD programcounter, WORD address, BYTE write, BYTE value, ULONG nCycles);
void FreeMemImage(void);
@ -1509,10 +1513,9 @@ bool MemIsAddrCodeMemory(const USHORT addr)
//===========================================================================
static HANDLE g_hMemImage = NULL; // NB. This handle is NULL (not INVALID_HANDLE_VALUE) when not initialised
static void FreeMemImage(void)
{
#ifdef _MSC_VER
if (memimage == NULL)
return;
@ -1529,10 +1532,14 @@ static void FreeMemImage(void)
{
ALIGNED_FREE(memimage);
}
#else
ALIGNED_FREE(memimage);
#endif
}
static LPBYTE AllocMemImage(void)
{
#ifdef _MSC_VER
LPBYTE baseAddr = NULL;
// Allocate memory for 'memimage' (and the alias 'mem')
@ -1552,7 +1559,8 @@ static LPBYTE AllocMemImage(void)
// NB. Returns NULL on failure (not INVALID_HANDLE_VALUE)
if (g_hMemImage != NULL)
{
for (UINT retry = 0; retry < 10; retry++)
UINT retry = 10;
do
{
baseAddr = (LPBYTE)VirtualAlloc(0, totalVirtualSize, MEM_RESERVE, PAGE_NOACCESS);
if (baseAddr)
@ -1563,7 +1571,7 @@ static LPBYTE AllocMemImage(void)
while (count < num64KPages)
{
// MSDN: "To specify a suggested base address for the view, use the MapViewOfFileEx function. However, this practice is not recommended."
// This is why we retry 10 times.
// This is why we retry multiple times.
if (!MapViewOfFileEx(g_hMemImage, FILE_MAP_ALL_ACCESS, 0, 0, _6502_MEM_LEN, baseAddr + count * _6502_MEM_LEN))
break;
count++;
@ -1578,6 +1586,7 @@ static LPBYTE AllocMemImage(void)
UnmapViewOfFile(baseAddr + i * _6502_MEM_LEN);
}
}
while (retry--);
if (!res)
FreeMemImage();
@ -1595,9 +1604,15 @@ static LPBYTE AllocMemImage(void)
}
if (!res)
{
LogFileOutput("MemInitialize: Failed to map 2 adjacent virtual 64K pages (reverting to old method).\n");
baseAddr = ALIGNED_ALLOC(_6502_MEM_LEN);
}
return baseAddr;
#else
return ALIGNED_ALLOC(_6502_MEM_LEN);
#endif
}
//===========================================================================