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Simplify code to pick mapping size in PCMWAV provider, just use sizeof(void*) to determine address space size. 

Originally committed to SVN as r2830.
This commit is contained in:
Niels Martin Hansen 2009-04-18 15:16:15 +00:00
parent 5a50efac9f
commit 58ec137621
1 changed files with 8 additions and 12 deletions
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20
aegisub/src/audio_provider_pcm.cpp
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@ -158,18 +158,14 @@ char * PCMAudioProvider::EnsureRangeAccessible(int64_t range_start, int64_t rang
// Align range start on a 1 MB boundary and go 16 MB back
mapping_start = (range_start & ~0xFFFFF) - 0x1000000;
if (mapping_start < 0) mapping_start = 0;
#ifdef _WINDOWS
# if defined(_M_X64) || defined(_M_IA64)
// Make 2 GB mappings by default on 64 bit archs
mapping_length = 0x80000000;
# else
// Make 256 MB mappings by default on x86
mapping_length = 0x10000000;
# endif
#else
// 256 MB
mapping_length = 0x10000000;
#endif
if (sizeof(void*) > 4)
// Large address space, use a 2 GB mapping
mapping_length = 0x80000000;
else
// Small (32 bit) address space, use a 256 MB mapping
mapping_length = 0x10000000;
// Make sure to always make a mapping at least as large as the requested range
if ((int64_t)mapping_length < range_length) {
if (range_length > (int64_t)(~(size_t)0))