CodeLife2012 comments

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                                            CodeLife2012

Func 'doFullWriteBack' in place update mmap file, will corrupt file when func is not finished but process exit.

I test the code, aborted the process when `doFullWriteBack` is running. Func `checkDataValid` report `check crc failed`, then the file is cleared.

Func 'doFullWriteBack' in place update mmap file, will corrupt file when func is not finished but process exit.

@lingol You should use a new file instead of updating the mmap file directly, clear the mmap file only when keys are actually saved to the new file.

Func 'doFullWriteBack' in place update mmap file, will corrupt file when func is not finished but process exit.

@lingol Should delete old file first, then rename new file.

Func 'doFullWriteBack' in place update mmap file, will corrupt file when func is not finished but process exit.

@lingol If old file exist, recover from the old file. If crashed before rename but after delete, use the new file.

Func 'doFullWriteBack' in place update mmap file, will corrupt file when func is not finished but process exit.

Func `doFullWriteBack ` will call `sync(MMKV_SYNC)` to sync the `m_file` and `m_metaFile`.

Where is the modified sqlite library that supports asynchronous checkout

According to this https://cloud.tencent.com/developer/article/1031030

ivars not working.

Oh，it's on Mac OS.

Can't execute task_for_pid after added procmod？

Should I need disable rootless? Seems not work after I disable rootless. Now it will report ``` [ERROR] vm_read failed! 1 (readmem, 178) ```

crash: Unlock of an os_unfair_lock not owned by current thread in iOS12

same issue

fix issue #724 & #711 - two threads attempt to use the same database connection & prepared statements

Cached `FMStatement` access by multi thread. Root cause maybe gcd autorelease pool pop is not invoked when finish block execution, so temp var is not guarantee released on the serial...