[PATCH v3] win32: check for NULL after creating thread

From: Rose via GitGitGadget <gitgitgadget@gmail.com>
Date: Feb 1, 2023, 14:40 UTC
Message-ID: <pull.1445.v3.git.git.1675262454817.gitgitgadget@gmail.com>
In-Reply-To: <pull.1445.v2.git.git.1675176818033.gitgitgadget@gmail.com>

From: Seija Kijin <doremylover123@gmail.com>

Check for NULL handles, not "INVALID_HANDLE," as CreateThread guarantees a valid handle in most cases.

The return value for failed thread creation is NULL, not INVALID_HANDLE_VALUE, unlike other Windows API functions.

Signed-off-by: Seija Kijin <doremylover123@gmail.com>
---
    win32: check for NULL after creating thread
    
    Check for NULL handles, not "INVALID_HANDLE," as CreateThread guarantees
    a valid handle in most cases.
    
    The return value for failed thread creation is NULL, not
    INVALID_HANDLE_VALUE, unlike other Windows API functions.
    
    Signed-off-by: Seija Kijin doremylover123@gmail.com

Published-As: https://github.com/gitgitgadget/git/releases/tag/pr-git-1445%2FAtariDreams%2FhThread-v3
Fetch-It-Via: git fetch https://github.com/gitgitgadget/git pr-git-1445/AtariDreams/hThread-v3
Pull-Request: https://github.com/git/git/pull/1445

Range-diff vs v2:

 1:  c956cafdec9 ! 1:  1cbc43e0d82 win32: check for NULL after creating thread
     @@ Commit message
          as CreateThread guarantees a valid handle in most cases.
      
          The return value for failed thread creation is NULL,
     -    not INVALID_HANDLE_VALUE, unlike other Windows
     -    API functions.
     +    not INVALID_HANDLE_VALUE, unlike other Windows API functions.
      
          Signed-off-by: Seija Kijin <doremylover123@gmail.com>

 compat/winansi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compat/winansi.c b/compat/winansi.c
index 3abe8dd5a27..f83610f684d 100644
--- a/compat/winansi.c
+++ b/compat/winansi.c
@@ -644,7 +644,7 @@ void winansi_init(void)
 
 	/* start console spool thread on the pipe's read end */
 	hthread = CreateThread(NULL, 0, console_thread, NULL, 0, NULL);
-	if (hthread == INVALID_HANDLE_VALUE)
+	if (!hthread)
 		die_lasterr("CreateThread(console_thread) failed");
 
 	/* schedule cleanup routine */

base-commit: 2fc9e9ca3c7505bc60069f11e7ef09b1aeeee473

-- 
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