Oki Minabe
95dc647c3c
mm/umm_heap/: Handle size zero in umm_malloc.c and umm_realloc.c, which causes a system freeze in kernel mode.
2020-02-01 14:03:28 +00:00
Gregory Nutt
90e4cf4349
mm/umm_heap: sbrk() is only available in the KERNEL build.
2019-02-04 10:32:31 -06:00
Xiang Xiao
2671709e62
mm/umm_heap: Ensure all user allocation try sbrk before fail
2019-01-26 10:42:36 -06:00
Gregory Nutt
b54ffe858a
Standardization of some function headers.
2018-03-13 09:52:27 -06:00
Gregory Nutt
7cf88d7dbd
Make sure that labeling is used consistently in all function headers.
2018-02-01 10:00:02 -06:00
Gregory Nutt
59cc4a7a7b
Protected mode: Redesign how the user space heap is accessed from the kernel code. It used to call memory management functions in user space via function pointers in the userspace interface. That is inefficient because the first thing that those memory management functions do is to trap back into the kernel to get the current PID. Worse, that operation can be fatal is certain fragile situations such as when a task is exitting.
...
The solution is to remove all of the memory management function calls from the interface. Instead, the interface exports the userspace heap structure and then kernel size implementations of those memory management functions will operate on the userspace heap structure. This avoids the unnecessary system calls and, more importantly, failures do to freeing memory when a test exits.
2015-07-10 08:37:02 -06:00
Gregory Nutt
b33c2d9cef
Move include/nuttx/mm.h to include/nuttx/mm/mm.h
2014-09-24 07:29:09 -06:00
Gregory Nutt
8b8c134efa
Move the user heap allocator front-end from mm/. to mm/umm_heap/.
2014-09-22 10:48:58 -06:00
