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userspace: improve dynamic object allocation

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We now have a low-level function z_dynamic_object_create()
which is not a system call and is used for installing
kernel objects that are not supported by k_object_alloc().

Checking for valid object type enumeration values moved
completely to the implementation function.

A few debug messages and comments were improved.

Futexes and sys_mutexes are now properly excluded from
dynamic generation.

Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>
This commit is contained in:
Andrew Boie 2020-05-29 17:49:02 -07:00 • committed by Carles Cufí
commit be919d3bf7
4 changed files with 100 additions and 35 deletions
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29
include/kernel.h
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@ -352,6 +352,27 @@ void k_object_access_all_grant(void *object);
__syscall void *k_object_alloc(enum k_objects otype);
#ifdef CONFIG_DYNAMIC_OBJECTS
/**
* Allocate memory and install as a generic kernel object
*
* This is a low-level function to allocate some memory, and register that
* allocated memory in the kernel object lookup tables with type K_OBJ_ANY.
* Initialization state and thread permissions will be cleared. The
* returned z_object's data value will be uninitialized.
*
* Most users will want to use k_object_alloc() instead.
*
* Memory allocated will be drawn from the calling thread's reasource pool
* and may be freed later by passing the actual object pointer (found
* in the returned z_object's 'name' member) to k_object_free().
*
* @param size Size of the allocated object
* @return NULL on insufficient memory
* @return A pointer to the associated z_object that is installed in the
* kernel object tables
*/
struct z_object *z_dynamic_object_create(size_t size);
/**
* Free a kernel object previously allocated with k_object_alloc()
*
@ -370,6 +391,14 @@ static inline void *z_impl_k_object_alloc(enum k_objects otype)
return NULL;
}
static inline struct z_object *z_dynamic_object_create(size_t size)
{
ARG_UNUSED(size);
return NULL;
}
/**
* @brief Free an object
*