程序遇到return语句不返回吗？？

只看该作者 · 2010-11-15 11:33

单步运行的步骤大概是下面这个样子的，运行到return语句为什么会不跳出这个函数呢？而是继续返回到函数里面，这个是ADS1.2环境下，是uc/fs源代码里的一个函数？为什么执行完return还不结束呢？红色是单步的过程……

int FS__lb_write(const FS__device_type *pDriver, FS_u32 Unit, FS_u32 Sector, void *pBuffer) {
  int x;
  if (pDriver->dev_write) {
FS_X_OS_LockDeviceOp(pDriver, Unit);
x = (pDriver->dev_write)(Unit, Sector, pBuffer);
#if FS_USE_LB_READCACHE
if (x==0) {
   _FS_LB_UpdateInCache(pDriver, Unit, Sector, pBuffer);
}
else {
   _FS_LB_ClearCache(pDriver, Unit);
}
#endif  /* FS_USE_LB_READCACHE */
FS_X_OS_UnlockDeviceOp(pDriver, Unit);
return x;
  }
  return -1;
}

int FS__lb_write(const FS__device_type *pDriver, FS_u32 Unit, FS_u32 Sector, void *pBuffer) {
  int x;
  if (pDriver->dev_write) {
FS_X_OS_LockDeviceOp(pDriver, Unit);
x = (pDriver->dev_write)(Unit, Sector, pBuffer);
#if FS_USE_LB_READCACHE
if (x==0) {
   _FS_LB_UpdateInCache(pDriver, Unit, Sector, pBuffer);
}
else {
   _FS_LB_ClearCache(pDriver, Unit);
}
#endif  /* FS_USE_LB_READCACHE */
FS_X_OS_UnlockDeviceOp(pDriver, Unit);
return x;
  }
  return -1;
}

int FS__lb_write(const FS__device_type *pDriver, FS_u32 Unit, FS_u32 Sector, void *pBuffer) {
  int x;
  if (pDriver->dev_write) {
FS_X_OS_LockDeviceOp(pDriver, Unit);
x = (pDriver->dev_write)(Unit, Sector, pBuffer);
#if FS_USE_LB_READCACHE
if (x==0) {
   _FS_LB_UpdateInCache(pDriver, Unit, Sector, pBuffer);
}
else {
   _FS_LB_ClearCache(pDriver, Unit);
}
#endif  /* FS_USE_LB_READCACHE */
FS_X_OS_UnlockDeviceOp(pDriver, Unit);
return x;
  }
  return -1;
}

int FS__lb_write(const FS__device_type *pDriver, FS_u32 Unit, FS_u32 Sector, void *pBuffer) {
  int x;
  if (pDriver->dev_write) {
FS_X_OS_LockDeviceOp(pDriver, Unit);
x = (pDriver->dev_write)(Unit, Sector, pBuffer);
#if FS_USE_LB_READCACHE
if (x==0) {
   _FS_LB_UpdateInCache(pDriver, Unit, Sector, pBuffer);
}
else {
   _FS_LB_ClearCache(pDriver, Unit);
}
#endif  /* FS_USE_LB_READCACHE */
FS_X_OS_UnlockDeviceOp(pDriver, Unit);
return x;
  }
  return -1;
}

int FS__lb_write(const FS__device_type *pDriver, FS_u32 Unit, FS_u32 Sector, void *pBuffer) {
  int x;
  if (pDriver->dev_write) {
FS_X_OS_LockDeviceOp(pDriver, Unit);
x = (pDriver->dev_write)(Unit, Sector, pBuffer);
#if FS_USE_LB_READCACHE
if (x==0) {
   _FS_LB_UpdateInCache(pDriver, Unit, Sector, pBuffer);
}
else {
   _FS_LB_ClearCache(pDriver, Unit);
}
#endif  /* FS_USE_LB_READCACHE */
FS_X_OS_UnlockDeviceOp(pDriver, Unit);
return x;
  }
  return -1;
}

int FS__lb_write(const FS__device_type *pDriver, FS_u32 Unit, FS_u32 Sector, void *pBuffer) {
  int x;
  if (pDriver->dev_write) {
FS_X_OS_LockDeviceOp(pDriver, Unit);
x = (pDriver->dev_write)(Unit, Sector, pBuffer);
#if FS_USE_LB_READCACHE
if (x==0) {
   _FS_LB_UpdateInCache(pDriver, Unit, Sector, pBuffer);
}
else {
   _FS_LB_ClearCache(pDriver, Unit);
}
#endif  /* FS_USE_LB_READCACHE */
FS_X_OS_UnlockDeviceOp(pDriver, Unit);
return x;
  }
  return -1;
}