[Log4cplus-devel] [ log4cplus-Bugs-3568882 ] Unnamed semaphores are not supported on Mac OS X

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Bugs item #3568882, was opened at 2012-09-18 04:46
Message generated for change (Comment added) made by rueegg
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Category: Appender
Group: v1.1.x
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Christian Rüegg (rueegg)
Assigned to: Václav Zeman (wilx)
Summary: Unnamed semaphores are not supported on Mac OS X

Initial Comment:
use named semaphores.

See:
http://stackoverflow.com/questions/1413785/sem-init-on-os-x

----------------------------------------------------------------------

>Comment By: Christian Rüegg (rueegg)
Date: 2012-09-18 06:29

Message:
Named semaphores seem to work in my quick test. Except I had problems on
app exit (crash in log thread). But this might be another bug.

g++ --version
i686-apple-darwin11-llvm-g++-4.2 (GCC) 4.2.1 (Based on Apple Inc. build
5658) (LLVM build 2336.11.00)

echo | g++ -dD -E -
# 1 "<stdin>"
# 1 "<built-in>"
#define __STDC__ 1
#define __STDC_HOSTED__ 1
#define __GNUC__ 4
#define __GNUC_MINOR__ 2
#define __GNUC_PATCHLEVEL__ 1
#define __APPLE_CC__ 5658
#define __llvm__ 1
#define __SIZE_TYPE__ long unsigned int
#define __PTRDIFF_TYPE__ long int
#define __WCHAR_TYPE__ int
#define __WINT_TYPE__ int
#define __INTMAX_TYPE__ long int
#define __UINTMAX_TYPE__ long unsigned int
#define __GXX_ABI_VERSION 1002
#define __SCHAR_MAX__ 127
#define __SHRT_MAX__ 32767
#define __INT_MAX__ 2147483647
#define __LONG_MAX__ 9223372036854775807L
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __WCHAR_MAX__ 2147483647
#define __CHAR_BIT__ 8
#define __INTMAX_MAX__ 9223372036854775807L
#define __FLT_EVAL_METHOD__ 0
#define __DEC_EVAL_METHOD__ 2
#define __FLT_RADIX__ 2
#define __FLT_MANT_DIG__ 24
#define __FLT_DIG__ 6
#define __FLT_MIN_EXP__ (-125)
#define __FLT_MIN_10_EXP__ (-37)
#define __FLT_MAX_EXP__ 128
#define __FLT_MAX_10_EXP__ 38
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MIN__ 1.17549435e-38F
#define __FLT_EPSILON__ 1.19209290e-7F
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __FLT_HAS_DENORM__ 1
#define __FLT_HAS_INFINITY__ 1
#define __FLT_HAS_QUIET_NAN__ 1
#define __DBL_MANT_DIG__ 53
#define __DBL_DIG__ 15
#define __DBL_MIN_EXP__ (-1021)
#define __DBL_MIN_10_EXP__ (-307)
#define __DBL_MAX_EXP__ 1024
#define __DBL_MAX_10_EXP__ 308
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_MIN__ 2.2250738585072014e-308
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __DBL_HAS_DENORM__ 1
#define __DBL_HAS_INFINITY__ 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __LDBL_MANT_DIG__ 64
#define __LDBL_DIG__ 18
#define __LDBL_MIN_EXP__ (-16381)
#define __LDBL_MIN_10_EXP__ (-4931)
#define __LDBL_MAX_EXP__ 16384
#define __LDBL_MAX_10_EXP__ 4932
#define __DECIMAL_DIG__ 21
#define __LDBL_MAX__ 1.18973149535723176502e+4932L
#define __LDBL_MIN__ 3.36210314311209350626e-4932L
#define __LDBL_EPSILON__ 1.08420217248550443401e-19L
#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
#define __LDBL_HAS_DENORM__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __DEC32_MANT_DIG__ 7
#define __DEC32_MIN_EXP__ (-95)
#define __DEC32_MAX_EXP__ 96
#define __DEC32_MIN__ 1E-95DF
#define __DEC32_MAX__ 9.999999E96DF
#define __DEC32_EPSILON__ 1E-6DF
#define __DEC32_DEN__ 0.000001E-95DF
#define __DEC64_MANT_DIG__ 16
#define __DEC64_MIN_EXP__ (-383)
#define __DEC64_MAX_EXP__ 384
#define __DEC64_MIN__ 1E-383DD
#define __DEC64_MAX__ 9.999999999999999E384DD
#define __DEC64_EPSILON__ 1E-15DD
#define __DEC64_DEN__ 0.000000000000001E-383DD
#define __DEC128_MANT_DIG__ 34
#define __DEC128_MIN_EXP__ (-6143)
#define __DEC128_MAX_EXP__ 6144
#define __DEC128_MIN__ 1E-6143DL
#define __DEC128_MAX__ 9.999999999999999999999999999999999E6144DL
#define __DEC128_EPSILON__ 1E-33DL
#define __DEC128_DEN__ 0.000000000000000000000000000000001E-6143DL
#define __REGISTER_PREFIX__ 
#define __USER_LABEL_PREFIX__ _
#define __VERSION__ "4.2.1 (Based on Apple Inc. build 5658) (LLVM build
2336.11.00)"
#define __GNUC_GNU_INLINE__ 1
#define _LP64 1
#define __LP64__ 1
#define __BLOCKS__ 1
#define __NO_INLINE__ 1
#define __FINITE_MATH_ONLY__ 0
#define __pic__ 2
#define __PIC__ 2
#define __SSP__ 1
#define __amd64 1
#define __amd64__ 1
#define __x86_64 1
#define __x86_64__ 1
#define __tune_core2__ 1
#define __MMX__ 1
#define __SSE__ 1
#define __SSE2__ 1
#define __SSE3__ 1
#define __SSE_MATH__ 1
#define __SSE2_MATH__ 1
#define __k8 1
#define __k8__ 1
#define __NO_MATH_INLINES 1
#define __LITTLE_ENDIAN__ 1
#define __MACH__ 1
#define __APPLE__ 1







clang --version
Apple clang version 4.0 (tags/Apple/clang-421.0.60) (based on LLVM 3.1svn)
Target: x86_64-apple-darwin12.1.0

echo | xcrun clang -dD -E -
# 1 "<stdin>"
# 1 "<stdin>" 1
# 1 "<built-in>" 1
# 1 "<built-in>" 3
#define __llvm__ 1
#define __clang__ 1
#define __clang_major__ 4
#define __clang_minor__ 0
#define __clang_patchlevel__ 0
#define __clang_version__ "4.0 ((tags/Apple/clang-421.0.60))"
#define __GNUC_MINOR__ 2
#define __GNUC_PATCHLEVEL__ 1
#define __GNUC__ 4
#define __GXX_ABI_VERSION 1002
#define __ATOMIC_RELAXED 0
#define __ATOMIC_CONSUME 1
#define __ATOMIC_ACQUIRE 2
#define __ATOMIC_RELEASE 3
#define __ATOMIC_ACQ_REL 4
#define __ATOMIC_SEQ_CST 5
#define __PRAGMA_REDEFINE_EXTNAME 1
#define __VERSION__ "4.2.1 Compatible Apple Clang 4.0
((tags/Apple/clang-421.0.60))"
#define __CONSTANT_CFSTRINGS__ 1
#define __block __attribute__((__blocks__(byref)))
#define __BLOCKS__ 1
#define __GXX_RTTI 1
#define __CHAR_BIT__ 8
#define __SCHAR_MAX__ 127
#define __SHRT_MAX__ 32767
#define __INT_MAX__ 2147483647
#define __LONG_MAX__ 9223372036854775807L
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __WCHAR_MAX__ 2147483647
#define __INTMAX_MAX__ 9223372036854775807L
#define __SIZEOF_DOUBLE__ 8
#define __SIZEOF_FLOAT__ 4
#define __SIZEOF_INT__ 4
#define __SIZEOF_LONG__ 8
#define __SIZEOF_LONG_DOUBLE__ 16
#define __SIZEOF_LONG_LONG__ 8
#define __SIZEOF_POINTER__ 8
#define __SIZEOF_SHORT__ 2
#define __SIZEOF_PTRDIFF_T__ 8
#define __SIZEOF_SIZE_T__ 8
#define __SIZEOF_WCHAR_T__ 4
#define __SIZEOF_WINT_T__ 4
#define __INTMAX_TYPE__ long int
#define __UINTMAX_TYPE__ long unsigned int
#define __INTMAX_WIDTH__ 64
#define __PTRDIFF_TYPE__ long int
#define __PTRDIFF_WIDTH__ 64
#define __INTPTR_TYPE__ long int
#define __INTPTR_WIDTH__ 64
#define __SIZE_TYPE__ long unsigned int
#define __SIZE_WIDTH__ 64
#define __WCHAR_TYPE__ int
#define __WCHAR_WIDTH__ 32
#define __WINT_TYPE__ int
#define __WINT_WIDTH__ 32
#define __SIG_ATOMIC_WIDTH__ 32
#define __CHAR16_TYPE__ unsigned short
#define __CHAR32_TYPE__ unsigned int
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __FLT_HAS_DENORM__ 1
#define __FLT_DIG__ 6
#define __FLT_EPSILON__ 1.19209290e-7F
#define __FLT_HAS_INFINITY__ 1
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MANT_DIG__ 24
#define __FLT_MAX_10_EXP__ 38
#define __FLT_MAX_EXP__ 128
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MIN_10_EXP__ (-37)
#define __FLT_MIN_EXP__ (-125)
#define __FLT_MIN__ 1.17549435e-38F
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __DBL_HAS_DENORM__ 1
#define __DBL_DIG__ 15
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __DBL_HAS_INFINITY__ 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __DBL_MANT_DIG__ 53
#define __DBL_MAX_10_EXP__ 308
#define __DBL_MAX_EXP__ 1024
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_MIN_10_EXP__ (-307)
#define __DBL_MIN_EXP__ (-1021)
#define __DBL_MIN__ 2.2250738585072014e-308
#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
#define __LDBL_HAS_DENORM__ 1
#define __LDBL_DIG__ 18
#define __LDBL_EPSILON__ 1.08420217248550443401e-19L
#define __LDBL_HAS_INFINITY__ 1
#define __LDBL_HAS_QUIET_NAN__ 1
#define __LDBL_MANT_DIG__ 64
#define __LDBL_MAX_10_EXP__ 4932
#define __LDBL_MAX_EXP__ 16384
#define __LDBL_MAX__ 1.18973149535723176502e+4932L
#define __LDBL_MIN_10_EXP__ (-4931)
#define __LDBL_MIN_EXP__ (-16381)
#define __LDBL_MIN__ 3.36210314311209350626e-4932L
#define __POINTER_WIDTH__ 64
#define __INT8_TYPE__ char
#define __INT16_TYPE__ short
#define __INT32_TYPE__ int
#define __INT64_TYPE__ long long int
#define __INT64_C_SUFFIX__ LL

#define __USER_LABEL_PREFIX__ _
#define __FINITE_MATH_ONLY__ 0
#define __GNUC_STDC_INLINE__ 1
#define __NO_INLINE__ 1
#define __PIC__ 1
#define __pic__ 1
#define __FLT_EVAL_METHOD__ 0
#define __FLT_RADIX__ 2
#define __DECIMAL_DIG__ 21
#define __SSP__ 1
#define _LP64 1
#define __LP64__ 1
#define __amd64__ 1
#define __amd64 1
#define __x86_64 1
#define __x86_64__ 1
#define __core2 1
#define __core2__ 1
#define __tune_core2__ 1
#define __LITTLE_ENDIAN__ 1
#define __REGISTER_PREFIX__ 
#define __NO_MATH_INLINES 1
#define __SSSE3__ 1
#define __SSE3__ 1
#define __SSE2__ 1
#define __SSE2_MATH__ 1
#define __SSE__ 1
#define __SSE_MATH__ 1
#define __MMX__ 1
#define __APPLE_CC__ 5621
#define __APPLE__ 1
#define __MACH__ 1
#define OBJC_NEW_PROPERTIES 1
#define __apple_build_version__ 4210060
#define __weak __attribute__((objc_gc(weak)))
#define __strong 
#define __unsafe_unretained 
#define __DYNAMIC__ 1
#define __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ 1080
#define __STDC__ 1
#define __STDC_HOSTED__ 1
#define __STDC_VERSION__ 199901L

# 1 "<command line>" 1
# 1 "<built-in>" 2
# 1 "<stdin>" 2



----------------------------------------------------------------------

Comment By: Václav Zeman (wilx)
Date: 2012-09-18 06:21

Message:
It seems that I could just use named semaphores on MacOS X instead. I do
not want to use OS specific headers if I can avoid it. I'll see what I can
do later today.

Could you please give me the output of "echo | g++ -dD -E -" (or similar)
command?

----------------------------------------------------------------------

Comment By: Christian Rüegg (rueegg)
Date: 2012-09-18 05:14

Message:
Taken from 
http://www.opensource.apple.com/source/freeradius/freeradius-36/freeradius/src/main/threads.c

Please add surrounding ifdefs

    #include <mach/mach.h>
    #include <mach/task.h>
    #include <mach/semaphore.h>

    #undef sem_t
    #define sem_t semaphore_t
    #undef sem_init
    #define sem_init(s,p,c)
semaphore_create(mach_task_self(),s,SYNC_POLICY_FIFO,c)
    #undef sem_wait
    #define sem_wait(s) semaphore_wait(*s)
    #undef sem_post
    #define sem_post(s) semaphore_signal(*s)
    #undef sem_destroy
    #define sem_destroy(s) semaphore_destroy(mach_task_self(),*s)


----------------------------------------------------------------------

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