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Related Modules:
Description:
Defines pointers to the memory driver functions.
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AllocMem )(GrallocBuffer *buffer) |
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FreeMem )(GrallocBuffer *buffer) |
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Mmap )(GrallocBuffer *buffer) |
Maps memory with a specified physical address and size to memory without cache in the process's address space. |
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MmapCache )(GrallocBuffer *buffer) |
Maps memory with a specified physical address and size to memory with cache in the process's address space. |
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Unmap )(GrallocBuffer *buffer) |
Unmaps memory, that is, removes any mappings in the process's address space. |
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FlushCache )(GrallocBuffer *buffer) |
Flushes data from the cache to memory and invalidates the data in the cache. |
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FlushMCache )(GrallocBuffer *buffer) |
Flushes data from the cache mapping to Mmap to memory and invalidates the data in the cache. |
int32_t(* GrallocFuncs::AllocMem) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Allocates memory based on the parameters passed by the GUI.
Parameters:
| hdl | Indicates the pointer to the handle of memory. |
| type | Indicates the type of memory to allocate. The value[/table/tgroup/tbody/row/entry/div {""}) [/table/tgroup/tbody/row/entry/div/div {""}) 0 (div] (div] indicates memory without cache, [/table/tgroup/tbody/row/entry/div {""}) [/table/tgroup/tbody/row/entry/div/div {""}) 1 (div] (div] indicates memory with cache, and[/table/tgroup/tbody/row/entry/div {""}) [/table/tgroup/tbody/row/entry/div/div {""}) 2 (div] (div] indicates shared memory. |
| size | Indicates the size of memory to allocate, in bytes. |
Returns:
Returns 0 if the operation is successful; returns an error code defined in DispErrCode otherwise.
int32_t(* GrallocFuncs::FlushCache) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Flushes data from the cache to memory and invalidates the data in the cache.
Parameters:
| hdl | Indicates the pointer to the handle of the cache. |
| size | Indicates the size of the cache from which data is to flush. |
Returns:
Returns 0 if the operation is successful; returns an error code defined in DispErrCode otherwise.
int32_t(* GrallocFuncs::FlushMCache) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Flushes data from the cache mapping to Mmap to memory and invalidates the data in the cache.
Parameters:
| hdl | Indicates the pointer to the handle of the cache. |
| size | Indicates the size of the cache from which data is to flush. |
Returns:
Returns 0 if the operation is successful; returns an error code defined in DispErrCode otherwise.
void(* GrallocFuncs::FreeMem) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Releases memory.
Parameters:
| hdl | Indicates the pointer to the handle of memory that has been applied for. |
void*(* GrallocFuncs::Mmap) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Maps memory with a specified physical address and size to memory without cache in the process's address space.
Parameters:
| phyAddr | Indicates the physical address of memory to map. |
| size | Indicates the size of memory to map. |
Returns:
Returns the pointer to a valid address if the operation is successful; returns NULL otherwise.
void*(* GrallocFuncs::MmapCache) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Maps memory with a specified physical address and size to memory with cache in the process's address space.
Parameters:
| phyAddr | Indicates the physical address of memory to map. |
| size | Indicates the size of memory to map. |
Returns:
Returns the pointer to a valid address if the operation is successful; returns NULL otherwise.
int32_t(* GrallocFuncs::Unmap) ([GrallocBuffer](GrallocBuffer.md) *buffer)
Description:
Unmaps memory, that is, removes any mappings in the process's address space.
Parameters:
| virAddr | Indicates the pointer to the virtual address of memory to unmap. |
| size | Indicates the size of memory to unmap. |
Returns:
Returns 0 if the operation is successful; returns an error code defined in DispErrCode otherwise.
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