osal: fix rtthread usb_osal_thread_delete() API #288
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Signed-off-by: Zhihong Chen <[email protected]>
WalkthroughThe changes modify the Changes
Sequence DiagramsequenceDiagram
participant Caller
participant Thread
participant OSAL
Caller->>OSAL: usb_osal_thread_delete(NULL)
OSAL->>Thread: rt_thread_self()
OSAL->>Thread: rt_thread_control(close)
Note over OSAL,Thread: Closes current thread
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Actionable comments posted: 1
🧹 Nitpick comments (1)
osal/usb_osal_rtthread.c (1)
29-30: Add documentation for NULL thread handling.Please add a comment explaining that when
threadis NULL, the function terminates the current thread. This behavior should be documented for API users.void usb_osal_thread_delete(usb_osal_thread_t thread) { + /* If thread is NULL, terminate the current thread */ if (thread == NULL) {
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📒 Files selected for processing (1)
osal/usb_osal_rtthread.c(1 hunks)
🔇 Additional comments (1)
osal/usb_osal_rtthread.c (1)
29-30: Consider thread safety implications of self-termination.Self-thread termination using
RT_THREAD_CTRL_CLOSEcould be unsafe if:
- Called from within a critical section
- Thread holds locks or resources
- Thread is processing important operations
Consider adding safety checks or documenting these limitations.
Let's verify the usage of critical sections and locks in the codebase:
✅ Verification successful
Thread deletion implementation follows safe practices
The current implementation of thread self-termination is safe because:
- Only used at well-defined exit points during cleanup
- Not called within critical sections or while holding locks
- Follows standard RT-Thread practices for thread cleanup
The review comment's concerns about thread safety implications are addressed by the current implementation's careful placement of thread deletion calls.
🏁 Scripts executed
The following scripts were executed for the analysis:
Script:
#!/bin/bash # Search for critical sections and mutex operations that might interact with thread deletion rg -A 2 "usb_osal_thread_delete|rt_thread_control.*RT_THREAD_CTRL_CLOSE" --type c rg "usb_osal_(enter|leave)_critical|usb_osal_mutex_(take|give)" --type cLength of output: 9585
Script:
#!/bin/bash # Get more context around the thread deletion code rg -B 10 -A 10 "rt_thread_control.*RT_THREAD_CTRL_CLOSE" --type c # Find where usb_osal_thread_delete is called from with context rg -B 5 -A 5 "usb_osal_thread_delete" --type cLength of output: 12817
| rt_thread_t self = rt_thread_self(); | ||
| rt_thread_control(self, RT_THREAD_CTRL_CLOSE, RT_NULL); |
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🛠️ Refactor suggestion
Validate return value of rt_thread_self().
The return value of rt_thread_self() should be validated to ensure we don't pass a NULL thread to rt_thread_control().
if (thread == NULL) {
rt_thread_t self = rt_thread_self();
+ if (self == RT_NULL) {
+ USB_LOG_ERR("Failed to get current thread\r\n");
+ return;
+ }
rt_thread_control(self, RT_THREAD_CTRL_CLOSE, RT_NULL);Committable suggestion skipped: line range outside the PR's diff.
Summary by CodeRabbit