libs/libc/semaphore: allow nxsem_init to negative value

wangchdo · anchao · commit 8cfb9d70530f · 2025-08-31T18:38:03.000+08:00
Allow user to init semaphore value to negative value, this is needed in some use cases
diff --git a/include/nuttx/semaphore.h b/include/nuttx/semaphore.h
@@ -147,7 +147,7 @@ extern "C"
  *
  ****************************************************************************/
 
-int nxsem_init(FAR sem_t *sem, int pshared, uint32_t value);
+int nxsem_init(FAR sem_t *sem, int pshared, int32_t value);
 
 /****************************************************************************
  * Name: nxsem_destroy
diff --git a/libs/libc/semaphore/sem_init.c b/libs/libc/semaphore/sem_init.c
@@ -62,7 +62,7 @@
  *
  ****************************************************************************/
 
-int nxsem_init(FAR sem_t *sem, int pshared, uint32_t value)
+int nxsem_init(FAR sem_t *sem, int pshared, int32_t value)
 {
   UNUSED(pshared);
 

Original file line number	Diff line number	Diff line change
`@@ -147,7 +147,7 @@ extern "C"`
`147`	`147`	`*`
`148`	`148`	`****************************************************************************/`
`149`	`149`
`150`		`-int nxsem_init(FAR sem_t *sem, int pshared, uint32_t value);`
	`150`	`+int nxsem_init(FAR sem_t *sem, int pshared, int32_t value);`
`151`	`151`
`152`	`152`	`/****************************************************************************`
`153`	`153`	`* Name: nxsem_destroy`
Original file line number	Diff line number	Diff line change
`@@ -62,7 +62,7 @@`
`62`	`62`	`*`
`63`	`63`	`****************************************************************************/`
`64`	`64`
`65`		`-int nxsem_init(FAR sem_t *sem, int pshared, uint32_t value)`
	`65`	`+int nxsem_init(FAR sem_t *sem, int pshared, int32_t value)`
`66`	`66`	`{`
`67`	`67`	`UNUSED(pshared);`
`68`	`68`