mirror of https://github.com/rusefi/rusefi.git
71 lines
1.6 KiB
C++
71 lines
1.6 KiB
C++
#include "pch.h"
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#include "big_buffer.h"
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static BigBufferUser s_currentUser;
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// uint32_t type to get 4-byte alignment
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// alignment is required since we sometimes allocate objects in the buffer (like Timer of CompositeBuffer)
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// we've only observed issue on F7 in -Os compiler configuration but technically all processors care
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static uint32_t s_bigBuffer[BIG_BUFFER_SIZE / sizeof(uint32_t)];
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#if EFI_UNIT_TEST
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BigBufferUser getBigBufferCurrentUser() {
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return s_currentUser;
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}
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#endif // EFI_UNIT_TEST
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static void releaseBuffer(void* bufferPtr, BigBufferUser user) {
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if (bufferPtr != &s_bigBuffer || user != s_currentUser) {
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// todo: panic!
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}
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s_currentUser = BigBufferUser::None;
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}
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BigBufferHandle::BigBufferHandle(void* buffer, BigBufferUser user)
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: m_bufferPtr(buffer)
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, m_user(user)
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{
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}
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BigBufferHandle::BigBufferHandle(BigBufferHandle&& other) {
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// swap contents of the two objects
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m_bufferPtr = other.m_bufferPtr;
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other.m_bufferPtr = nullptr;
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m_user = other.m_user;
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other.m_user = BigBufferUser::None;
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}
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BigBufferHandle& BigBufferHandle::operator= (BigBufferHandle&& other) {
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if (this != &other) {
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if (m_bufferPtr) {
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releaseBuffer(m_bufferPtr, m_user);
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}
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// swap contents of the two objects
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m_bufferPtr = other.m_bufferPtr;
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other.m_bufferPtr = nullptr;
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m_user = other.m_user;
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other.m_user = BigBufferUser::None;
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}
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return *this;
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}
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BigBufferHandle::~BigBufferHandle() {
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if (m_bufferPtr) {
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releaseBuffer(m_bufferPtr, m_user);
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}
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}
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BigBufferHandle getBigBuffer(BigBufferUser user) {
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if (s_currentUser != BigBufferUser::None) {
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// fatal
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return {};
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}
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s_currentUser = user;
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return BigBufferHandle(s_bigBuffer, user);
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}
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