mirror of
https://github.com/shadps4-emu/ext-cryptopp.git
synced 2024-12-12 12:36:05 +00:00
75 lines
3.4 KiB
C
75 lines
3.4 KiB
C
// allocate.h - written and placed in the public domain by Jeffrey Walton
|
|
|
|
// The functions in allocate.h and allocate.cpp were originally in misc.h
|
|
// and misc.cpp. They were extracted in September 2019 to sidestep a circular
|
|
// dependency with misc.h and secblock.h.
|
|
|
|
/// \file allocate.h
|
|
/// \brief Functions for allocating aligned buffers
|
|
|
|
#ifndef CRYPTOPP_ALLOCATE_H
|
|
#define CRYPTOPP_ALLOCATE_H
|
|
|
|
#include "config.h"
|
|
#include "cryptlib.h"
|
|
|
|
NAMESPACE_BEGIN(CryptoPP)
|
|
|
|
/// \brief Attempts to reclaim unused memory
|
|
/// \throw bad_alloc
|
|
/// \details In the normal course of running a program, a request for memory
|
|
/// normally succeeds. If a call to AlignedAllocate or UnalignedAllocate fails,
|
|
/// then CallNewHandler is called in n effort to recover. Internally,
|
|
/// CallNewHandler calls set_new_handler(nullptr) in an effort to free memory.
|
|
/// There is no guarantee CallNewHandler will be able to obtain more memory so
|
|
/// an allocation succeeds. If the call to set_new_handler fails, then CallNewHandler
|
|
/// throws a bad_alloc exception.
|
|
/// \throw bad_alloc on failure
|
|
/// \since Crypto++ 5.0
|
|
/// \sa AlignedAllocate, AlignedDeallocate, UnalignedAllocate, UnalignedDeallocate
|
|
CRYPTOPP_DLL void CRYPTOPP_API CallNewHandler();
|
|
|
|
/// \brief Allocates a buffer on 16-byte boundary
|
|
/// \param size the size of the buffer
|
|
/// \details AlignedAllocate is primarily used when the data will be
|
|
/// processed by SSE, NEON, ARMv8 or PowerPC instructions. The assembly
|
|
/// language routines rely on the alignment. If the alignment is not
|
|
/// respected, then a SIGBUS could be generated on Unix and Linux, and an
|
|
/// EXCEPTION_DATATYPE_MISALIGNMENT could be generated on Windows.
|
|
/// \details Formerly, AlignedAllocate and AlignedDeallocate were only
|
|
/// available on certain platforms when CRYTPOPP_DISABLE_ASM was not in
|
|
/// effect. However, Android and iOS debug simulator builds got into a
|
|
/// state where the aligned allocator was not available and caused link
|
|
/// failures.
|
|
/// \since AlignedAllocate for SIMD since Crypto++ 1.0, AlignedAllocate
|
|
/// for all builds since Crypto++ 8.1
|
|
/// \sa AlignedDeallocate, UnalignedAllocate, UnalignedDeallocate, CallNewHandler,
|
|
/// <A HREF="http://github.com/weidai11/cryptopp/issues/779">Issue 779</A>
|
|
CRYPTOPP_DLL void* CRYPTOPP_API AlignedAllocate(size_t size);
|
|
|
|
/// \brief Frees a buffer allocated with AlignedAllocate
|
|
/// \param ptr the buffer to free
|
|
/// \since AlignedDeallocate for SIMD since Crypto++ 1.0, AlignedAllocate
|
|
/// for all builds since Crypto++ 8.1
|
|
/// \sa AlignedAllocate, UnalignedAllocate, UnalignedDeallocate, CallNewHandler,
|
|
/// <A HREF="http://github.com/weidai11/cryptopp/issues/779">Issue 779</A>
|
|
CRYPTOPP_DLL void CRYPTOPP_API AlignedDeallocate(void *ptr);
|
|
|
|
/// \brief Allocates a buffer
|
|
/// \param size the size of the buffer
|
|
/// \since Crypto++ 1.0
|
|
/// \sa AlignedAllocate, AlignedDeallocate, UnalignedDeallocate, CallNewHandler,
|
|
/// <A HREF="http://github.com/weidai11/cryptopp/issues/779">Issue 779</A>
|
|
CRYPTOPP_DLL void * CRYPTOPP_API UnalignedAllocate(size_t size);
|
|
|
|
/// \brief Frees a buffer allocated with UnalignedAllocate
|
|
/// \param ptr the buffer to free
|
|
/// \since Crypto++ 1.0
|
|
/// \sa AlignedAllocate, AlignedDeallocate, UnalignedAllocate, CallNewHandler,
|
|
/// <A HREF="http://github.com/weidai11/cryptopp/issues/779">Issue 779</A>
|
|
CRYPTOPP_DLL void CRYPTOPP_API UnalignedDeallocate(void *ptr);
|
|
|
|
NAMESPACE_END
|
|
|
|
#endif // CRYPTOPP_ALLOCATE_H
|