From 8649b14591217331b80221833527674ea984cac5 Mon Sep 17 00:00:00 2001
From: x_xiny <1301913191@qq.com>
Date: Tue, 22 Jun 2021 10:55:23 +0800
Subject: [PATCH] =?UTF-8?q?=20feat:=20m=E6=A0=B8=E6=96=B0=E5=A2=9Eposix?=
 =?UTF-8?q?=E6=8E=A5=E5=8F=A3sem=5Fgetvalue?=
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【背景】
 m核新增posix接口适配

【修改方案】
 接口新增sem_getvalue，并在内核适配相应接口

【影响】
 无

 re #I3WW8S

 Signed-off-by: x_xiny <1301913191@qq.com>
 Change-Id: I65a4baa242aaedc2fec9b6ed705dbb1ddb6e70c9

Change-Id: Id4c38a5dd4ac4e90f1bd032a39dcb97ce29de5f9
---
 kal/posix/src/semaphore.c | 18 ++++++++++++++++++
 kernel/include/los_sem.h  |  2 ++
 kernel/src/los_sem.c      | 12 ++++++++++++
 3 files changed, 32 insertions(+)

diff --git a/kal/posix/src/semaphore.c b/kal/posix/src/semaphore.c
index 349a8fe9..87686681 100644
--- a/kal/posix/src/semaphore.c
+++ b/kal/posix/src/semaphore.c
@@ -186,3 +186,21 @@ int sem_timedwait(sem_t *sem, const struct timespec *timeout)
 
     return 0;
 }
+
+int sem_getvalue(sem_t *sem, int *currVal)
+{
+    UINT32 ret;
+
+    if ((sem == NULL) || (currVal == NULL)) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    ret = LOS_SemGetValue(sem->s_handle, currVal);
+    if (ret) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    return LOS_OK;
+}
\ No newline at end of file
diff --git a/kernel/include/los_sem.h b/kernel/include/los_sem.h
index 49fbb816..cd403682 100644
--- a/kernel/include/los_sem.h
+++ b/kernel/include/los_sem.h
@@ -285,6 +285,8 @@ extern UINT32 LOS_SemPend(UINT32 semHandle, UINT32 timeout);
  */
 extern UINT32 LOS_SemPost(UINT32 semHandle);
 
+extern UINT32 LOS_SemGetValue(UINT32 semHandle, INT32 *currVal);
+
 /**
  * @ingroup los_sem
  * Semaphore control structure.
diff --git a/kernel/src/los_sem.c b/kernel/src/los_sem.c
index fdf8f52d..685256ce 100644
--- a/kernel/src/los_sem.c
+++ b/kernel/src/los_sem.c
@@ -312,4 +312,16 @@ LITE_OS_SEC_TEXT UINT32 LOS_SemPost(UINT32 semHandle)
     return LOS_OK;
 }
 
+LITE_OS_SEC_TEXT UINT32 LOS_SemGetValue(UINT32 semHandle, INT32 *currVal)
+{
+    LosSemCB *sem = GET_SEM(semHandle);
+
+    if (semHandle >= (UINT32)LOSCFG_BASE_IPC_SEM_LIMIT) {
+        OS_RETURN_ERROR(LOS_ERRNO_SEM_INVALID);
+    }
+
+    *currVal = sem->semCount;
+    return 0;
+}
+
 #endif /* (LOSCFG_BASE_IPC_SEM == 1) */