Re: [PATCH v3] opensm/complib/cl_passivelock.h: some casting issues

[Yevgeny Kliteynik <kliteyn-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>]

Hi Sasha,

On 03/Feb/10 12:51, Sasha Khapyorsky wrote:
> Hi Yevgeny,
>
> On 15:24 Tue 02 Feb     , Yevgeny Kliteynik wrote:
>>
>> There are couple of problematic castings in complib/cl_passivelock.h:
>>
>> (cl_status_t) pthread_rwlock_*()
>>
>> Turns out that compiler doesn't like casting directly from
>> int to enum, probably because int can be negative:
>>
>> cl_passivelock.h:199: warning: cast from function call of type 'int' to non-matching type 'enum _cl_status'
>> cl_passivelock.h:241: warning: cast from function call of type 'int' to non-matching type 'enum _cl_status'
>> cl_passivelock.h:274: warning: cast from function call of type 'int' to non-matching type 'enum _cl_status'
>> cl_passivelock.h:306: warning: cast from function call of type 'int' to non-matching type 'enum _cl_status'
>>
>> Se we need to cast the return value in two stages:
>> to unsigned, and then to enum.
>
> Instead of bothering with ugly integer casting (and so ugly
> double/triple/etc casting...) would not it be better to just convert
> cl_status_t to int?

Sure, why not.

-- Yevgeny

> Something like:
>
> typedef int cl_status_t;
>
> #define CL_SUCCESS 0
> #define CL_BLAHBLAH -1
> ...
>
> Sasha
>
>>
>> Signed-off-by: Yevgeny Kliteynik<kliteyn-LDSdmyG8hGV8YrgS2mwiifqBs+8SCbDb@public.gmane.org>
>> ---
>>
>> Changes from v2: can't do implicit casting from unsigned
>>                   to enum, so specifying it explicitly.
>>
>>   opensm/include/complib/cl_passivelock.h |    8 ++++----
>>   1 files changed, 4 insertions(+), 4 deletions(-)
>>
>> diff --git a/opensm/include/complib/cl_passivelock.h b/opensm/include/complib/cl_passivelock.h
>> index bafd339..aba4e64 100644
>> --- a/opensm/include/complib/cl_passivelock.h
>> +++ b/opensm/include/complib/cl_passivelock.h
>> @@ -196,7 +196,7 @@ static inline cl_status_t cl_plock_init(IN cl_plock_t * const p_lock)
>>   	cl_status_t status;
>>
>>   	CL_ASSERT(p_lock);
>> -	status = (cl_status_t) pthread_rwlock_init(&p_lock->lock, NULL);
>> +	status = (cl_status_t)(unsigned) pthread_rwlock_init(&p_lock->lock, NULL);
>>   	if (status)
>>   		return CL_ERROR;
>>   	p_lock->state = CL_INITIALIZED;
>> @@ -238,7 +238,7 @@ static inline void cl_plock_acquire(IN cl_plock_t * const p_lock)
>>   	CL_ASSERT(p_lock);
>>   	CL_ASSERT(p_lock->state == CL_INITIALIZED);
>>
>> -	status = (cl_status_t) pthread_rwlock_rdlock(&p_lock->lock);
>> +	status = (cl_status_t)(unsigned) pthread_rwlock_rdlock(&p_lock->lock);
>>   	CL_ASSERT(status == 0);
>>   }
>>
>> @@ -271,7 +271,7 @@ static inline void cl_plock_excl_acquire(IN cl_plock_t * const p_lock)
>>   	CL_ASSERT(p_lock);
>>   	CL_ASSERT(p_lock->state == CL_INITIALIZED);
>>
>> -	status = (cl_status_t) pthread_rwlock_wrlock(&p_lock->lock);
>> +	status = (cl_status_t)(unsigned) pthread_rwlock_wrlock(&p_lock->lock);
>>   	CL_ASSERT(status == 0);
>>   }
>>
>> @@ -303,7 +303,7 @@ static inline void cl_plock_release(IN cl_plock_t * const p_lock)
>>   	CL_ASSERT(p_lock);
>>   	CL_ASSERT(p_lock->state == CL_INITIALIZED);
>>
>> -	status = (cl_status_t) pthread_rwlock_unlock(&p_lock->lock);
>> +	status = (cl_status_t)(unsigned) pthread_rwlock_unlock(&p_lock->lock);
>>   	CL_ASSERT(status == 0);
>>   }
>>
>> --
>> 1.5.1.4
>> --
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>

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