cann: use thread local var

noemotiovon · noemotiovon · commit 1ab6ec26c9af · 2025-10-24T09:15:49.000Z
diff --git a/ggml/src/ggml-cann/ggml-cann.cpp b/ggml/src/ggml-cann/ggml-cann.cpp
@@ -67,8 +67,8 @@
     GGML_ABORT("CANN error");
 }
 
-// Global variable to record the current device of this process.
-static int g_current_cann_device = -1;
+// Thread-local variable to record the current device of this thread.
+thread_local int g_current_cann_device = -1;
 
 /**
  * @brief Set the CANN device to be used.

Original file line number	Diff line number	Diff line change
`@@ -67,8 +67,8 @@`
`67`	`67`	`GGML_ABORT("CANN error");`
`68`	`68`	`}`
`69`	`69`
`70`		`-// Global variable to record the current device of this process.`
`71`		`-static int g_current_cann_device = -1;`
	`70`	`+// Thread-local variable to record the current device of this thread.`
	`71`	`+thread_local int g_current_cann_device = -1;`
`72`	`72`
`73`	`73`	`/**`
`74`	`74`	`* @brief Set the CANN device to be used.`