[STDCXX-162] [x86_64] atomic operations disabled

• Type: Improvement
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 4.1.3
• Fix Version/s: 5.0.0
• Component/s: Configuration

Environment

x86_64

• Severity: Inefficiency
• Assignee: Unassigned
• Reporter: Martin Sebor
• Created: 07/Mar/06 04:12
• Updated: 30/Mar/08 20:52
• Resolved: 25/Aug/07 22:20

Description

Atomic operations are disabled on AMD64 and EM64T.

$ uname -srp && cat t.cpp && make t && LD_LIBRARY_PATH=../lib:$LD_LIBRARY_PATH ./t
Linux 2.6.9-22.ELsmp x86_64
#include <cassert>
#include <string>
#include <pthread.h>

int main ()
{
typedef std::char_traits<char> Traits;
typedef std::allocator<char> Allocator;
typedef _rw::_string_ref<char, Traits, Allocator> strref;

struct SmallRef

{ int ref_count; std::string::size_type capacity; std::string::size_type size; }

;

struct LargeRef

{ pthread_mutex_t mutex; int ref_count; std::string::size_type capacity; std::string::size_type size; }

;

assert (sizeof (strref) <= sizeof (SmallRef));
assert (sizeof (strref) < sizeof (LargeRef));
}
gcc -c -I/build/sebor/dev/stdlib/include/ansi -D_RWSTDDEBUG -pthread -D_RWSTD_USE_CONFIG -I/build/sebor/gcc-3.4.4-15D/include -I/build/sebor/dev/stdlib/include -I/build/sebor/dev/stdlib/../rwtest -I/build/sebor/dev/stdlib/../rwtest/include -I/build/sebor/dev/stdlib/tests/include -pedantic -nostdinc++ -g -Wall -W -Wcast-qual -Winline -Wshadow -Wwrite-strings -Wno-long-long -Wcast-align t.cpp
gcc t.o -o t -L/build/sebor/gcc-3.4.4-15D/rwtest -lrwtest15d -pthread -L/build/sebor/gcc-3.4.4-15D/lib -lstd15d -lsupc++ -lm
t: t.cpp:24: int main(): Assertion `sizeof (strref) <= sizeof (SmallRef)' failed.
Aborted

Issue Links

• is duplicated by: STDCXX-518 std::string copy constructor slow
• relates to: STDCXX-538 ATOMIC_OPS.cpp test fails to link (unresolved external symbol: _InterlockedIncrement)
• relates to: STDCXX-809 [Solaris Threads] notypenameerr error on thr_mutex_t in 21.string.stdcxx-162.cpp