Use new method to set affinity.

src/common/Platform.cpp

@@ -29,16 +29,16 @@
 #include "Platform.h"
 
 
-char *Platform::m_defaultConfigName = nullptr;
-char *Platform::m_userAgent         = nullptr;
+char Platform::m_defaultConfigName[520] = { 0 };
+xmrig::c_str Platform::m_userAgent;
 
 
 const char *Platform::defaultConfigName()
 {
     size_t size = 520;
 
-    if (m_defaultConfigName == nullptr) {
-        m_defaultConfigName = new char[size];
+    if (*m_defaultConfigName) {
+        return m_defaultConfigName;
     }
 
     if (uv_exepath(m_defaultConfigName, &size) < 0) {
@@ -58,5 +58,6 @@ const char *Platform::defaultConfigName()
         }
     }
 
+    *m_defaultConfigName = '\0';
     return nullptr;
 }

src/common/Platform.h

@@ -25,20 +25,26 @@
 #define __PLATFORM_H__
 
 
+#include <stdint.h>
+
+
+#include "common/utils/c_str.h"
+
+
 class Platform
 {
 public:
+    static bool setThreadAffinity(uint64_t cpu_id);
     static const char *defaultConfigName();
     static void init(const char *userAgent);
-    static void release();
     static void setProcessPriority(int priority);
     static void setThreadPriority(int priority);
 
-    static inline const char *userAgent() { return m_userAgent; }
+    static inline const char *userAgent() { return m_userAgent.data(); }
 
 private:
-    static char *m_defaultConfigName;
-    static char *m_userAgent;
+    static char m_defaultConfigName[520];
+    static xmrig::c_str m_userAgent;
 };
 
 

src/common/Platform_mac.cpp

@@ -22,6 +22,8 @@
  */
 
 
+#include <mach/thread_act.h>
+#include <mach/thread_policy.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/resource.h>
@@ -53,15 +55,24 @@ static inline char *createUserAgent()
 }
 
 
-void Platform::init(const char *userAgent)
+bool Platform::setThreadAffinity(uint64_t cpu_id)
 {
-    m_userAgent = userAgent ? strdup(userAgent) : createUserAgent();
+    thread_port_t mach_thread;
+    thread_affinity_policy_data_t policy = { static_cast<integer_t>(cpu_id) };
+    mach_thread = pthread_mach_thread_np(pthread_self());
+
+    return thread_policy_set(mach_thread, THREAD_AFFINITY_POLICY, (thread_policy_t)&policy, 1) == KERN_SUCCESS;
 }
 
 
-void Platform::release()
+void Platform::init(const char *userAgent)
 {
-    delete [] m_userAgent;
+    if (userAgent) {
+        m_userAgent = userAgent;
+    }
+    else {
+        m_userAgent = createUserAgent();
+    }
 }
 
 

src/common/Platform_unix.cpp

@@ -21,6 +21,14 @@
  *   along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#ifdef __FreeBSD__
+#   include <sys/types.h>
+#   include <sys/param.h>
+#   include <sys/cpuset.h>
+#   include <pthread_np.h>
+#endif
+
+
 #include <sched.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -37,6 +45,11 @@
 #endif
 
 
+#ifdef __FreeBSD__
+typedef cpuset_t cpu_set_t;
+#endif
+
+
 static inline char *createUserAgent()
 {
     const size_t max = 160;
@@ -63,15 +76,28 @@ static inline char *createUserAgent()
 }
 
 
-void Platform::init(const char *userAgent)
+bool Platform::setThreadAffinity(uint64_t cpu_id)
 {
-    m_userAgent = userAgent ? strdup(userAgent) : createUserAgent();
+    cpu_set_t mn;
+    CPU_ZERO(&mn);
+    CPU_SET(cpu_id, &mn);
+
+#   ifndef __ANDROID__
+    return pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &mn) == 0;
+#   else
+    return sched_setaffinity(gettid(), sizeof(cpu_set_t), &mn) == 0;
+#   endif
 }
 
 
-void Platform::release()
+void Platform::init(const char *userAgent)
 {
-    delete [] m_userAgent;
+    if (userAgent) {
+        m_userAgent = userAgent;
+    }
+    else {
+        m_userAgent = createUserAgent();
+    }
 }
 
 

src/common/Platform_win.cpp

@@ -27,9 +27,11 @@
 #include <uv.h>
 
 
+#include "log/Log.h"
 #include "Platform.h"
 #include "version.h"
 
+
 #ifdef XMRIG_NVIDIA_PROJECT
 #   include "nvidia/cryptonight.h"
 #endif
@@ -82,16 +84,24 @@ static inline char *createUserAgent()
 }
 
 
-void Platform::init(const char *userAgent)
+bool Platform::setThreadAffinity(uint64_t cpu_id)
 {
-    m_userAgent = userAgent ? strdup(userAgent) : createUserAgent();
+    if (cpu_id >= 64) {
+        LOG_ERR("Unable to set affinity. Windows supports only affinity up to 63.");
+    }
+
+    return SetThreadAffinityMask(GetCurrentThread(), 1ULL << cpu_id) != 0;
 }
 
 
-void Platform::release()
+void Platform::init(const char *userAgent)
 {
-    delete [] m_defaultConfigName;
-    delete [] m_userAgent;
+    if (userAgent) {
+        m_userAgent = userAgent;
+    }
+    else {
+        m_userAgent = createUserAgent();
+    }
 }
 
 
@@ -131,7 +141,6 @@ void Platform::setProcessPriority(int priority)
 }
 
 
-
 void Platform::setThreadPriority(int priority)
 {
     if (priority == -1) {