RFR: 8283287: Spring Cleaning for ClassLoader.c

[Thomas Stuefe]

On Wed, 16 Mar 2022 21:25:37 GMT, Tyler Steele <duke at openjdk.java.net> wrote:

> As mentioned in the issue, I'd like to perform the following tidying on ClassLoader.c
> 
> - Alphabetize includes.
> - Replace 'if (ptr == 0)' with 'if (ptr == NULL)'.
> - Replace 'return 0' with 'return NULL'.

Looks good in general. Question inline.

src/java.base/share/native/libjava/ClassLoader.c line 27:

> 25: 
> 26: #include <assert.h>
> 27: #include <errno.h>

Whats errno.h for?

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PR: https://git.openjdk.java.net/jdk/pull/7846