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add cmake and apple compability #2

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b7838fb
add cmake and apple compability
FreddyFunk Jan 13, 2023
80bacea
default to static lib
FreddyFunk Jan 13, 2023
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8 changes: 8 additions & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,8 @@
add_library(portable-memory-mapping STATIC
MemoryMapped.cpp
MemoryMapped.h
)

target_include_directories(portable-memory-mapping INTERFACE ./)

target_link_libraries(portable-memory-mapping)
13 changes: 12 additions & 1 deletion MemoryMapped.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,10 @@
#include <errno.h>
#include <unistd.h>
#endif

#if __APPLE__
#define stat64 stat
#define fstat64 fstat
#endif

/// do nothing, must use open()
MemoryMapped::MemoryMapped()
Expand Down Expand Up @@ -118,7 +121,11 @@ bool MemoryMapped::open(const std::string& filename, size_t mappedBytes, CacheHi
// Linux

// open file
#ifdef __APPLE__
_file = ::open(filename.c_str(), O_RDONLY);
#else
_file = ::open(filename.c_str(), O_RDONLY | O_LARGEFILE);
#endif
if (_file == -1)
{
_file = 0;
Expand Down Expand Up @@ -276,9 +283,13 @@ bool MemoryMapped::remap(uint64_t offset, size_t mappedBytes)

#else

#ifdef __APPLE__
_mappedView = ::mmap(NULL, mappedBytes, PROT_READ, MAP_SHARED, _file, offset);
#else
// Linux
// new mapping
_mappedView = ::mmap64(NULL, mappedBytes, PROT_READ, MAP_SHARED, _file, offset);
#endif
if (_mappedView == MAP_FAILED)
{
_mappedBytes = 0;
Expand Down