Question about mono_array_new

[ffbh123456]

What is the lifetime of the array created using mono_array_new? How can I ensure it persists for later use, and how can I manually release the memory when it's no longer needed?
Any help would be appreciated, thanks!

[huoyaoyuan]

Mono's GC does a conservative scan to find objects. Once you have registered your thread with mono_thread_attach, you can simply store it in a local variable and the GC will ensure it's alive.

To make a persist storage for latter use, you need to report the storage of the pointer with mono_gc_register_root.

GC will take care of releasing it and you can't do it manually.

See https://www.mono-project.com/docs/advanced/garbage-collector/sgen/#stopping-the-world and https://www.mono-project.com/docs/advanced/garbage-collector/sgen/#roots

[ffbh123456]

Thanks for pointing out mono_gc_register_root. Is there any documentation that explains how to use this method, including the meaning of its input arguments?

Also, I came across two methods: mono_gchandle_new_v2 and mono_gchandle_free_v2, which seem simpler. Can I use these to prevent the GC from collecting the array allocated with mono_array_new?

[huoyaoyuan]

The mono project document is somehow aged. mono_gc_register_root registers a region of memory to mono, indicates the content within it should be conservatively treated as gc roots. Once you put an object pointer into it, the object will be preserved.

mono_gchandle_new_v2 is new fashioned and should be used.