Define and manage fixed-size memory pools of objects of a given type. More...

#include <MemoryPool.h>

Inheritance diagram for MemoryPool< T, pool_sz >:

Public Member Functions
	MemoryPool ()
	Create and Initialize a memory pool. More...

	~MemoryPool ()
	Destroy a memory pool. More...

T *	alloc (void)
	Allocate a memory block from a memory pool, without blocking. More...

T *	alloc_for (uint32_t millisec)
	Allocate a memory block from a memory pool, optionally blocking. More...

T *	alloc_until (uint64_t millisec)
	Allocate a memory block from a memory pool, blocking. More...

T *	calloc (void)
	Allocate a memory block from a memory pool, without blocking, and set memory block to zero. More...

T *	calloc_for (uint32_t millisec)
	Allocate a memory block from a memory pool, optionally blocking, and set memory block to zero. More...

T *	calloc_until (uint64_t millisec)
	Allocate a memory block from a memory pool, blocking, and set memory block to zero. More...

osStatus	free (T *block)
	Free a memory block. More...

Detailed Description

template<typename T, uint32_t pool_sz>
class rtos::MemoryPool< T, pool_sz >

Define and manage fixed-size memory pools of objects of a given type.

Template Parameters

T	data type of a single object (element).
queue_sz	maximum number of objects (elements) in the memory pool.

Note: Memory considerations: The memory pool data store and control structures will be created on current thread's stack, both for the mbed OS and underlying RTOS objects (static or dynamic RTOS memory pools are not being used).

Definition at line 55 of file MemoryPool.h.

Constructor & Destructor Documentation

MemoryPool ( )

Create and Initialize a memory pool.

Note: You cannot call this function from ISR context.

Definition at line 62 of file MemoryPool.h.

~MemoryPool ( )

Destroy a memory pool.

Note: You cannot call this function from ISR context.

Definition at line 78 of file MemoryPool.h.

Member Function Documentation

T* alloc ( void )

Allocate a memory block from a memory pool, without blocking.

Returns: address of the allocated memory block or nullptr in case of no memory available.

Note: You may call this function from ISR context.

Definition at line 88 of file MemoryPool.h.

T* alloc_for ( uint32_t millisec )

Allocate a memory block from a memory pool, optionally blocking.

Parameters

millisec timeout value (osWaitForever to wait forever)

Returns: address of the allocated memory block or nullptr in case of no memory available.

Note: You may call this function from ISR context if the millisec parameter is set to 0.

Definition at line 99 of file MemoryPool.h.

T* alloc_until ( uint64_t millisec )

Allocate a memory block from a memory pool, blocking.

Parameters

millisec absolute timeout time, referenced to Kernel::get_ms_count().

Returns: address of the allocated memory block or nullptr in case of no memory available.

Note: You cannot call this function from ISR context.; the underlying RTOS may have a limit to the maximum wait time due to internal 32-bit computations, but this is guaranteed to work if the wait is <= 0x7fffffff milliseconds (~24 days). If the limit is exceeded, the wait will time out earlier than specified.

Definition at line 114 of file MemoryPool.h.

T* calloc ( void )

Allocate a memory block from a memory pool, without blocking, and set memory block to zero.

Returns: address of the allocated memory block or nullptr in case of no memory available.

Note: You may call this function from ISR context.

Definition at line 133 of file MemoryPool.h.

T* calloc_for ( uint32_t millisec )

Allocate a memory block from a memory pool, optionally blocking, and set memory block to zero.

Parameters

millisec timeout value (osWaitForever to wait forever)

Returns: address of the allocated memory block or nullptr in case of no memory available.

Note: You may call this function from ISR context if the millisec parameter is set to 0.

Definition at line 148 of file MemoryPool.h.

T* calloc_until ( uint64_t millisec )

Allocate a memory block from a memory pool, blocking, and set memory block to zero.

Parameters

millisec absolute timeout time, referenced to Kernel::get_ms_count().

Returns: address of the allocated memory block or nullptr in case of no memory available.

Note: You cannot call this function from ISR context.; the underlying RTOS may have a limit to the maximum wait time due to internal 32-bit computations, but this is guaranteed to work if the wait is <= 0x7fffffff milliseconds (~24 days). If the limit is exceeded, the wait will time out earlier than specified.

Definition at line 167 of file MemoryPool.h.

osStatus free ( T * block )

Free a memory block.

Parameters

block address of the allocated memory block to be freed.

Returns: osOK on successful deallocation, osErrorParameter if given memory block id is nullptr or invalid, or osErrorResource if given memory block is in an invalid memory pool state.

Note: You may call this function from ISR context.

Definition at line 184 of file MemoryPool.h.

Public Member Functions

Detailed Description

template<typename T, uint32_t pool_sz> class rtos::MemoryPool< T, pool_sz >

Constructor & Destructor Documentation

Member Function Documentation

Important Information for this Arm website

template<typename T, uint32_t pool_sz>
class rtos::MemoryPool< T, pool_sz >