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Support allocating stack from separate heap (#267)

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The change adds support for allocating task stacks from separate heap.
When configSTACK_ALLOCATION_FROM_SEPARATE_HEAP is defined as 1 in
FreeRTOSConfig.h, task stacks are allocated and freed using
pvPortMallocStack and vPortFreeStack functions. This allows the
application writer to provide a separate allocator for task stacks.

When configSTACK_ALLOCATION_FROM_SEPARATE_HEAP is defined as 0, task
stacks are allocated and freed using FreeRTOS heap functions
pvPortMalloc and vPortFree.

For backward compatibility, configSTACK_ALLOCATION_FROM_SEPARATE_HEAP
defaults to 0.

Signed-off-by: Gaurav Aggarwal <aggarg@amazon.com>
This commit is contained in:
Gaurav-Aggarwal-AWS
2021-02-23 18:36:27 -08:00
committed by GitHub
parent 81f5892105
commit 2a604f4a28
4 changed files with 19 additions and 5 deletions
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5
include/FreeRTOS.h
View File

@ -896,6 +896,11 @@
#define configSUPPORT_DYNAMIC_ALLOCATION 1
#endif
#ifndef configSTACK_ALLOCATION_FROM_SEPARATE_HEAP
/* Defaults to 0 for backward compatibility. */
#define configSTACK_ALLOCATION_FROM_SEPARATE_HEAP 0
#endif
#ifndef configSTACK_DEPTH_TYPE
/* Defaults to uint16_t for backward compatibility, but can be overridden

8
include/portable.h
View File

@ -179,6 +179,14 @@ void vPortInitialiseBlocks( void ) PRIVILEGED_FUNCTION;
size_t xPortGetFreeHeapSize( void ) PRIVILEGED_FUNCTION;
size_t xPortGetMinimumEverFreeHeapSize( void ) PRIVILEGED_FUNCTION;
#if( configSTACK_ALLOCATION_FROM_SEPARATE_HEAP == 1 )
void *pvPortMallocStack( size_t xSize ) PRIVILEGED_FUNCTION;
void vPortFreeStack( void *pv ) PRIVILEGED_FUNCTION;
#else
#define pvPortMallocStack pvPortMalloc
#define vPortFreeStack vPortFree
#endif
/*
* Setup the hardware ready for the scheduler to take control. This generally
* sets up a tick interrupt and sets timers for the correct tick frequency.