Update TODO
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Gregory Nutt
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TODO
88
TODO
@ -8,7 +8,7 @@ board port.
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nuttx/
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(9) Task/Scheduler (sched/)
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(10) Task/Scheduler (sched/)
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(1) Memory Managment (mm/)
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(3) Signals (sched/, arch/)
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(2) pthreads (sched/)
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@ -19,12 +19,12 @@ nuttx/
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(4) USB (drivers/usbdev, drivers/usbhost)
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(10) Libraries (libc/, )
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(11) File system/Generic drivers (fs/, drivers/)
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(6) Graphics subystem (graphics/)
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(8) Graphics subystem (graphics/)
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(1) Pascal add-on (pcode/)
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(1) Documentation (Documentation/)
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(2) Build system / Toolchains
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(3) Linux/Cywgin simulation (arch/sim)
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(4) ARM (arch/arm/)
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(5) ARM (arch/arm/)
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(1) ARM/C5471 (arch/arm/src/c5471/)
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(3) ARM/DM320 (arch/arm/src/dm320/)
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(2) ARM/i.MX (arch/arm/src/imx/)
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@ -47,7 +47,7 @@ nuttx/
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apps/
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(4) Network Utilities (apps/netutils/)
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(6) Network Utilities (apps/netutils/)
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(2) NuttShell (NSH) (apps/nshlib)
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(1) System libraries apps/system (apps/system)
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(4) Other Applications & Tests (apps/examples/)
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@ -159,6 +159,20 @@ o Task/Scheduler (sched/)
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incompatibilities could show up in porting some code).
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Priority: Low
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Title: REMOVE TASK_DELETE
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Description: Need to remove or fix task delete. This interface is non-
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standard and not safe. Arbitrary deleting tasks can cause
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serious problems such as memory leaks. Better to remove it
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than to retain it as a latent bug.
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Currently used within the OS and also part of the
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implementation of pthread_cancel() and task_restart() (which
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should also go for the same reasons). It is used in
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NxWM::CNxConsole to terminate console tasks and also in
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apps/netutils/thttpd to kill CGI tasks that timeout.
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Status: Open
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Priority: Low and not easily removable.
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o Memory Managment (mm/)
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^^^^^^^^^^^^^^^^^^^^^^
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@ -1225,6 +1239,31 @@ o Graphics subsystem (graphics/)
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Status: Open
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Priority: Low, the need has not yet arisen.
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Title: ANTI-ALIASING
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Description: Needed for proper rendering. After some analysis, I believe
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this change would only be required in the the trapezoid
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rendering logic. Essentially, it would need to blend the
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fractional pixels at ends of each run with the underlying
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pixel.
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Hmmm.. graphics are sometimes erased by just redrawing them
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with the background color. Would this approach leave ghost
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images around where the erase image was?
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Status: Open
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Priority: Medium-ish. This would definitely improve graphics rendering
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and line drawing.
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Title: LINE JOINS
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Description: Lines are currently draw as rectangles with the width of the
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rectangle being the line width. So when shapes, like circles,
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are drawn with fat lines, they do not join cleanly from
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segment to segment.
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The fix would be to draw a circle at each endpoint that has a
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radius equal to the width of the line.
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Status: Open
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Priority: Medium-ish. This would definitely improve line drawing.
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o Pascal Add-On (pcode/)
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^^^^^^^^^^^^^^^^^^^^^^
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@ -1408,6 +1447,27 @@ o ARM (arch/arm/)
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Priority: Low for me because I never do floating point operations in
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interrupt handlers.
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Title: IMPROVED TASK START-UP AND SYSCALL RETURN
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Description: Couldn't up_start_task and up_start_pthread syscalls be
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eliminated. Wouldn't this work to get us from kernel-
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to user-mode with a system trap:
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lda r13, #address
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str rn, [r13]
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msr spsr_SVC, rm
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ld r13,{r15}^
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Would also need to set r13_USER and r14_USER. For new SYS_context_switch... couldn't we do he same thing?
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Also... System calls use traps to get from user- to kernel-
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mode to perform OS services. That is necessary to get from
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user- to kernel-mode. But then another trap is used to get
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from kernel- back to user-mode. It seems like this second
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trap should be unnecessary. We should be able to do the
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same kind of logic to do this.
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Status: Open
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Priority: Low-ish, but a good opportunity for performance improvement.
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o ARM/C5471 (arch/arm/src/c5471/)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -2134,6 +2194,26 @@ o Network Utilities (apps/netutils/)
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Status: Open. An annoyance, but not a real problem.
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Priority: Low
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Title: DHCPD ACCESSES KERNEL PRIVATE INTERFACE
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Description: arp_update() is referenced outside of nuttx/net. It is used in
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in the netutils/ DHCPD logic to set entries in the ARP table.
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That is violation of the separation of kernel and OS
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functionality. As a consequence, dhcpd will not work with the
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NuttX kernel built.
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This direct OS call needs to be replaced with a network ioctl()
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call.
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Status: Open
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Priority: Medium. Important for full functionality with kernel build.
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Title: NETWORK MONITOR NOT GENERALLY AVAILABLE
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Description: The NSH network management logic has generally applicability
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but is currently useful only because it is embedded in the NSH
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module. It should be moved to apps/system or, better,
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apps/netutils.
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Status: Open
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Priority: Low
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o NuttShell (NSH) (apps/nshlib)
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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