Cleanup common POSIX functionality.

src/platform-solaris.cc

Index: src/platform-solaris.cc
diff --git a/src/platform-solaris.cc b/src/platform-solaris.cc
index 4b0094fb22fe6cc2e8df3c5b9c9fc112f858adb4..3c4df665f0cfe2748191fc83e8f511e95d61bfd4 100644
--- a/src/platform-solaris.cc
+++ b/src/platform-solaris.cc
@@ -38,7 +38,6 @@
 #include <ucontext.h>  // walkstack(), getcontext()
 #include <dlfcn.h>     // dladdr
 #include <pthread.h>
-#include <sched.h>  // for sched_yield
 #include <semaphore.h>
 #include <time.h>
 #include <sys/time.h>  // gettimeofday(), timeradd()
@@ -539,46 +538,6 @@ void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
 }
 
 
-void Thread::YieldCPU() {
-  sched_yield();
-}
-
-
-class SolarisMutex : public Mutex {
- public:
-  SolarisMutex() {
-    pthread_mutexattr_t attr;
-    pthread_mutexattr_init(&attr);
-    pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
-    pthread_mutex_init(&mutex_, &attr);
-  }
-
-  ~SolarisMutex() { pthread_mutex_destroy(&mutex_); }
-
-  int Lock() { return pthread_mutex_lock(&mutex_); }
-
-  int Unlock() { return pthread_mutex_unlock(&mutex_); }
-
-  virtual bool TryLock() {
-    int result = pthread_mutex_trylock(&mutex_);
-    // Return false if the lock is busy and locking failed.
-    if (result == EBUSY) {
-      return false;
-    }
-    ASSERT(result == 0);  // Verify no other errors.
-    return true;
-  }
-
- private:
-  pthread_mutex_t mutex_;
-};
-
-
-Mutex* OS::CreateMutex() {
-  return new SolarisMutex();
-}
-
-
 class SolarisSemaphore : public Semaphore {
  public:
   explicit SolarisSemaphore(int count) {  sem_init(&sem_, 0, count); }