X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=rts%2Fposix%2FSignals.c;h=b045289ce6fec2b65188d0db64534199ef10148d;hb=d108044bef62f6a0d579c92ced5e8188f72edc2d;hp=c1ffb5d2cfaa6f7a703d8e8acc5cb9cb9e6bf487;hpb=1c45176f3b9be75b5c4744d9ef074430bf034e3f;p=ghc-hetmet.git

diff --git a/rts/posix/Signals.c b/rts/posix/Signals.c
index c1ffb5d..b045289 100644
--- a/rts/posix/Signals.c
+++ b/rts/posix/Signals.c
@@ -6,18 +6,15 @@
  *
  * ---------------------------------------------------------------------------*/
 
-/* This is non-Posix-compliant.
-   #include "PosixSource.h" 
-*/
+#include "PosixSource.h" 
 #include "Rts.h"
-#include "SchedAPI.h"
+
 #include "Schedule.h"
 #include "RtsSignals.h"
-#include "posix/Signals.h"
+#include "Signals.h"
 #include "RtsUtils.h"
-#include "RtsFlags.h"
 #include "Prelude.h"
-#include "ThrIOManager.h"
+#include "Stable.h"
 
 #ifdef alpha_HOST_ARCH
 # if defined(linux_HOST_OS)
@@ -39,6 +36,10 @@
 # include <errno.h>
 #endif
 
+#ifdef HAVE_EVENTFD_H
+# include <sys/eventfd.h>
+#endif
+
 #include <stdlib.h>
 #include <string.h>
 
@@ -85,54 +86,76 @@ more_handlers(int sig)
 }
 
 // Here's the pipe into which we will send our signals
-static int io_manager_pipe = -1;
+static int io_manager_wakeup_fd = -1;
+static int io_manager_control_fd = -1;
 
 #define IO_MANAGER_WAKEUP 0xff
 #define IO_MANAGER_DIE    0xfe
+#define IO_MANAGER_SYNC   0xfd
 
 void
-setIOManagerPipe (int fd)
+setIOManagerWakeupFd (int fd)
 {
     // only called when THREADED_RTS, but unconditionally
-    // compiled here because GHC.Conc depends on it.
-    io_manager_pipe = fd;
+    // compiled here because System.Event.Control depends on it.
+    io_manager_wakeup_fd = fd;
+}
+
+void
+setIOManagerControlFd (int fd)
+{
+    // only called when THREADED_RTS, but unconditionally
+    // compiled here because System.Event.Control depends on it.
+    io_manager_control_fd = fd;
 }
 
-#if defined(THREADED_RTS)
 void
 ioManagerWakeup (void)
 {
     int r;
     // Wake up the IO Manager thread by sending a byte down its pipe
-    if (io_manager_pipe >= 0) {
+    if (io_manager_wakeup_fd >= 0) {
+#if defined(HAVE_EVENTFD)
+	StgWord64 n = (StgWord64)IO_MANAGER_WAKEUP;
+	r = write(io_manager_wakeup_fd, (char *) &n, 8);
+#else
 	StgWord8 byte = (StgWord8)IO_MANAGER_WAKEUP;
-	r = write(io_manager_pipe, &byte, 1);
+	r = write(io_manager_wakeup_fd, &byte, 1);
+#endif
         if (r == -1) { sysErrorBelch("ioManagerWakeup: write"); }
     }
 }
 
+#if defined(THREADED_RTS)
 void
 ioManagerDie (void)
 {
     int r;
     // Ask the IO Manager thread to exit
-    if (io_manager_pipe >= 0) {
+    if (io_manager_control_fd >= 0) {
 	StgWord8 byte = (StgWord8)IO_MANAGER_DIE;
-	r = write(io_manager_pipe, &byte, 1);
+	r = write(io_manager_control_fd, &byte, 1);
         if (r == -1) { sysErrorBelch("ioManagerDie: write"); }
-        close(io_manager_pipe);
-        io_manager_pipe = -1;
+        io_manager_control_fd = -1;
+        io_manager_wakeup_fd = -1;
     }
 }
 
+Capability *
+ioManagerStartCap (Capability *cap)
+{
+    return rts_evalIO(
+        cap,&base_GHCziConcziIO_ensureIOManagerIsRunning_closure,NULL);
+}
+
 void
 ioManagerStart (void)
 {
     // Make sure the IO manager thread is running
     Capability *cap;
-    if (io_manager_pipe < 0) {
+    if (io_manager_control_fd < 0 || io_manager_wakeup_fd < 0) {
 	cap = rts_lock();
-	cap = rts_evalIO(cap,&base_GHCziConc_ensureIOManagerIsRunning_closure,NULL);
+	cap = ioManagerStartCap(cap);
 	rts_unlock(cap);
     }
 }
@@ -161,14 +184,21 @@ generic_handler(int sig USED_IF_THREADS,
 {
 #if defined(THREADED_RTS)
 
-    if (io_manager_pipe != -1)
+    if (io_manager_control_fd != -1)
     {
         StgWord8 buf[sizeof(siginfo_t) + 1];
         int r;
 
         buf[0] = sig;
-        memcpy(buf+1, info, sizeof(siginfo_t));
-	r = write(io_manager_pipe, buf, sizeof(siginfo_t)+1);
+
+	if (info == NULL) {
+	    // info may be NULL on Solaris (see #3790)
+	    memset(buf+1, 0, sizeof(siginfo_t));
+	} else {
+	    memcpy(buf+1, info, sizeof(siginfo_t));
+	}
+
+	r = write(io_manager_control_fd, buf, sizeof(siginfo_t)+1);
         if (r == -1 && errno == EAGAIN)
         {
             errorBelch("lost signal due to full pipe: %d\n", sig);
@@ -235,7 +265,7 @@ initUserSignals(void)
 {
     sigemptyset(&userSignals);
 #ifndef THREADED_RTS
-    getStablePtr((StgPtr)&base_GHCziConc_runHandlers_closure); 
+    getStablePtr((StgPtr)&base_GHCziConcziSignal_runHandlers_closure);
     // needed to keep runHandler alive
 #endif
 }
@@ -389,7 +419,7 @@ startSignalHandlers(Capability *cap)
 		       RtsFlags.GcFlags.initialStkSize, 
                        rts_apply(cap,
                                  rts_apply(cap,
-                                           &base_GHCziConc_runHandlers_closure,
+                                           &base_GHCziConcziSignal_runHandlers_closure,
                                            rts_mkPtr(cap, info)),
                                  rts_mkInt(cap, info->si_signo))));
   }