From: Nikodemus Siivola <nikodemus@random-state.net>
Date: Mon, 5 Dec 2011 17:39:57 +0000 (+0200)
Subject: fix threaded PPC build, refactor new semaphore code
X-Git-Url: http://repo.macrolet.net/gitweb/?a=commitdiff_plain;h=d1942842cebf682ea4161792b2920eec7ccfe179;p=sbcl.git

fix threaded PPC build, refactor new semaphore code

 Refactor the recent semaphore code into nicer shape.

 * No point in having these functions as inline functions.

 * Move shared logic to os-common.c, and conditionalize it on
   CANNOT_USE_POSIX_SEM_T, which platform specific headers can define if they
   implement their own versions. (Darwin now, Windows in the future.)

 * PPC needs genesis/thread.h in assembly, not thread.h.
---

diff --git a/src/runtime/darwin-os.c b/src/runtime/darwin-os.c
index affbc72..df53e98 100644
--- a/src/runtime/darwin-os.c
+++ b/src/runtime/darwin-os.c
@@ -21,6 +21,7 @@
 #include <signal.h>
 #include <limits.h>
 #include <mach-o/dyld.h>
+#include <stdio.h>
 #include <errno.h>
 #include <dlfcn.h>
 
@@ -171,3 +172,48 @@ void darwin_init(void)
 
 #endif
 
+#ifdef LISP_FEATURE_SB_THREAD
+
+inline void
+os_sem_init(os_sem_t *sem, unsigned int value)
+{
+    if (KERN_SUCCESS!=semaphore_create(current_mach_task, sem, SYNC_POLICY_FIFO, (int)value))
+        lose("os_sem_init(%p): %s", sem, strerror(errno));
+}
+
+inline void
+os_sem_wait(os_sem_t *sem, char *what)
+{
+    kern_return_t ret;
+  restart:
+    FSHOW((stderr, "%s: os_sem_wait(%p)\n", what, sem));
+    ret = semaphore_wait(*sem);
+    FSHOW((stderr, "%s: os_sem_wait(%p) => %s\n", what, sem,
+           KERN_SUCCESS==ret ? "ok" : strerror(errno)));
+    switch (ret) {
+    case KERN_SUCCESS:
+        return;
+    case KERN_OPERATION_TIMED_OUT:
+        fprintf(stderr, "%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
+        goto restart;
+    default:
+        lose("%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
+    }
+}
+
+void
+os_sem_post(os_sem_t *sem, char *what)
+{
+    if (KERN_SUCCESS!=semaphore_signal(*sem))
+        lose("%s: os_sem_post(%p): %s", what, sem, strerror(errno));
+    FSHOW((stderr, "%s: os_sem_post(%p) ok\n", what, sem));
+}
+
+void
+os_sem_destroy(os_sem_t *sem)
+{
+    if (-1==semaphore_destroy(current_mach_task, *sem))
+        lose("os_sem_destroy(%p): %s", sem, strerror(errno));
+}
+
+#endif
diff --git a/src/runtime/darwin-os.h b/src/runtime/darwin-os.h
index a308fb1..9d0e000 100644
--- a/src/runtime/darwin-os.h
+++ b/src/runtime/darwin-os.h
@@ -40,4 +40,10 @@ extern mach_port_t current_mach_task;
 
 void darwin_init(void);
 
+#ifdef LISP_FEATURE_SB_THREAD
+#define CANNOT_USE_POSIX_SEM_T
+#include <mach/semaphore.h>
+typedef semaphore_t os_sem_t;
+#endif
+
 #endif /* _DARWIN_OS_H */
diff --git a/src/runtime/os-common.c b/src/runtime/os-common.c
index 3fdf925..fa845bf 100644
--- a/src/runtime/os-common.c
+++ b/src/runtime/os-common.c
@@ -73,3 +73,41 @@ os_get_errno(void)
 {
     return errno;
 }
+
+
+#if defined(LISP_FEATURE_SB_THREAD) && !defined(CANNOT_USE_POSIX_SEM_T)
+
+void
+os_sem_init(os_sem_t *sem, unsigned int value)
+{
+    if (-1==sem_init(sem, 0, value))
+        lose("os_sem_init(%p, %u): %s", sem, value, strerror(errno));
+    FSHOW((stderr, "os_sem_init(%p, %u)\n", sem, value));
+}
+
+void
+os_sem_wait(os_sem_t *sem, char *what)
+{
+    FSHOW((stderr, "%s: os_sem_wait(%p) ...\n", what, sem));
+    while (-1 == sem_wait(sem))
+        if (EINTR!=errno)
+            lose("%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
+    FSHOW((stderr, "%s: os_sem_wait(%p) => ok\n", what, sem));
+}
+
+void
+os_sem_post(sem_t *sem, char *what)
+{
+    if (-1 == sem_post(sem))
+        lose("%s: os_sem_post(%p): %s", what, sem, strerror(errno));
+    FSHOW((stderr, "%s: os_sem_post(%p)\n", what, sem));
+}
+
+void
+os_sem_destroy(os_sem_t *sem)
+{
+    if (-1==sem_destroy(sem))
+        lose("os_sem_destroy(%p): %s", sem, strerror(errno));
+}
+
+#endif
diff --git a/src/runtime/os.h b/src/runtime/os.h
index 8170a70..9dd1649 100644
--- a/src/runtime/os.h
+++ b/src/runtime/os.h
@@ -195,4 +195,15 @@ extern char *os_get_runtime_executable_path(int external_path);
 typedef os_vm_size_t word_t;
 #define WORD_FMTX OS_VM_SIZE_FMTX
 
+#ifdef LISP_FEATURE_SB_THREAD
+#  ifndef CANNOT_USE_POSIX_SEM_T
+#    include <semaphore.h>
+     typedef sem_t os_sem_t;
+#  endif
+   void os_sem_init(os_sem_t *sem, unsigned int value);
+   void os_sem_wait(os_sem_t *sem, char *what);
+   void os_sem_post(os_sem_t *sem, char *what);
+   void os_sem_destroy(os_sem_t *sem);
+#endif
+
 #endif
diff --git a/src/runtime/ppc-assem.S b/src/runtime/ppc-assem.S
index 128b3e0..3f0dd99 100644
--- a/src/runtime/ppc-assem.S
+++ b/src/runtime/ppc-assem.S
@@ -10,7 +10,7 @@
 #include "genesis/funcallable-instance.h"
 #include "genesis/static-symbols.h"
 #ifdef LISP_FEATURE_SB_THREAD
-#include "thread.h"
+#include "genesis/thread.h"
 #endif
 
 #ifdef LISP_FEATURE_DARWIN
diff --git a/src/runtime/thread.c b/src/runtime/thread.c
index 1e8402a..7a18c5a 100644
--- a/src/runtime/thread.c
+++ b/src/runtime/thread.c
@@ -119,6 +119,80 @@ unlink_thread(struct thread *th)
     if (th->next)
         th->next->prev = th->prev;
 }
+
+/* Only access thread state with blockables blocked. */
+lispobj
+thread_state(struct thread *thread)
+{
+    lispobj state;
+    sigset_t old;
+    block_blockable_signals(NULL, &old);
+    os_sem_wait(thread->state_sem, "thread_state");
+    state = thread->state;
+    os_sem_post(thread->state_sem, "thread_state");
+    thread_sigmask(SIG_SETMASK, &old, NULL);
+    return state;
+}
+
+void
+set_thread_state(struct thread *thread, lispobj state)
+{
+    int i, waitcount = 0;
+    sigset_t old;
+    block_blockable_signals(NULL, &old);
+    os_sem_wait(thread->state_sem, "set_thread_state");
+    if (thread->state != state) {
+        if ((STATE_STOPPED==state) ||
+            (STATE_DEAD==state)) {
+            waitcount = thread->state_not_running_waitcount;
+            thread->state_not_running_waitcount = 0;
+            for (i=0; i<waitcount; i++)
+                os_sem_post(thread->state_not_running_sem, "set_thread_state (not running)");
+        }
+        if ((STATE_RUNNING==state) ||
+            (STATE_DEAD==state)) {
+            waitcount = thread->state_not_stopped_waitcount;
+            thread->state_not_stopped_waitcount = 0;
+            for (i=0; i<waitcount; i++)
+                os_sem_post(thread->state_not_stopped_sem, "set_thread_state (not stopped)");
+        }
+        thread->state = state;
+    }
+    os_sem_post(thread->state_sem, "set_thread_state");
+    thread_sigmask(SIG_SETMASK, &old, NULL);
+}
+
+void
+wait_for_thread_state_change(struct thread *thread, lispobj state)
+{
+    sigset_t old;
+    os_sem_t *wait_sem;
+    block_blockable_signals(NULL, &old);
+  start:
+    os_sem_wait(thread->state_sem, "wait_for_thread_state_change");
+    if (thread->state == state) {
+        switch (state) {
+        case STATE_RUNNING:
+            wait_sem = thread->state_not_running_sem;
+            thread->state_not_running_waitcount++;
+            break;
+        case STATE_STOPPED:
+            wait_sem = thread->state_not_stopped_sem;
+            thread->state_not_stopped_waitcount++;
+            break;
+        default:
+            lose("Invalid state in wait_for_thread_state_change: "OBJ_FMTX"\n", state);
+        }
+    } else {
+        wait_sem = NULL;
+    }
+    os_sem_post(thread->state_sem, "wait_for_thread_state_change");
+    if (wait_sem) {
+        os_sem_wait(wait_sem, "wait_for_thread_state_change");
+        goto start;
+    }
+    thread_sigmask(SIG_SETMASK, &old, NULL);
+}
 #endif
 
 static int
diff --git a/src/runtime/thread.h b/src/runtime/thread.h
index 71d3342..fcc51b0 100644
--- a/src/runtime/thread.h
+++ b/src/runtime/thread.h
@@ -4,8 +4,6 @@
 #include <sys/types.h>
 #include <unistd.h>
 #include <stddef.h>
-#include <errno.h>
-#include <stdio.h>
 #include "sbcl.h"
 #include "globals.h"
 #include "runtime.h"
@@ -18,16 +16,6 @@ struct alloc_region { };
 #include "genesis/symbol.h"
 #include "genesis/static-symbols.h"
 
-#ifdef LISP_FEATURE_SB_THREAD
-# ifndef LISP_FEATURE_DARWIN
-#   include <semaphore.h>
-    typedef sem_t os_sem_t;
-# else
-#   include <mach/semaphore.h>
-    typedef semaphore_t os_sem_t;
-# endif
-#endif
-
 #include "genesis/thread.h"
 #include "genesis/fdefn.h"
 #include "interrupt.h"
@@ -37,162 +25,9 @@ struct alloc_region { };
 #define STATE_DEAD MAKE_FIXNUM(3)
 
 #ifdef LISP_FEATURE_SB_THREAD
-
-# ifndef LISP_FEATURE_DARWIN
-
-static inline void
-os_sem_init(os_sem_t *sem, unsigned int value)
-{
-    if (-1==sem_init(sem, 0, value))
-        lose("os_sem_init(%p, %u): %s", sem, value, strerror(errno));
-    FSHOW((stderr, "os_sem_init(%p, %u)\n", sem, value));
-}
-
-static inline void
-os_sem_wait(os_sem_t *sem, char *what)
-{
-    FSHOW((stderr, "%s: os_sem_wait(%p) ...\n", what, sem));
-    while (-1 == sem_wait(sem))
-        if (EINTR!=errno)
-            lose("%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
-    FSHOW((stderr, "%s: os_sem_wait(%p) => ok\n", what, sem));
-}
-
-static inline void
-os_sem_post(sem_t *sem, char *what)
-{
-    if (-1 == sem_post(sem))
-        lose("%s: os_sem_post(%p): %s", what, sem, strerror(errno));
-    FSHOW((stderr, "%s: os_sem_post(%p)\n", what, sem));
-}
-
-static inline void
-os_sem_destroy(os_sem_t *sem)
-{
-    if (-1==sem_destroy(sem))
-        lose("os_sem_destroy(%p): %s", sem, strerror(errno));
-}
-
-# else
-
-static inline void
-os_sem_init(os_sem_t *sem, unsigned int value)
-{
-    if (KERN_SUCCESS!=semaphore_create(current_mach_task, sem, SYNC_POLICY_FIFO, (int)value))
-        lose("os_sem_init(%p): %s", sem, strerror(errno));
-}
-
-static inline void
-os_sem_wait(os_sem_t *sem, char *what)
-{
-    kern_return_t ret;
-  restart:
-    FSHOW((stderr, "%s: os_sem_wait(%p)\n", what, sem));
-    ret = semaphore_wait(*sem);
-    FSHOW((stderr, "%s: os_sem_wait(%p) => %s\n", what, sem,
-           KERN_SUCCESS==ret ? "ok" : strerror(errno)));
-    switch (ret) {
-    case KERN_SUCCESS:
-        return;
-    case KERN_OPERATION_TIMED_OUT:
-        fprintf(stderr, "%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
-        goto restart;
-    default:
-        lose("%s: os_sem_wait(%p): %s", what, sem, strerror(errno));
-    }
-}
-
-static inline void
-os_sem_post(os_sem_t *sem, char *what)
-{
-    if (KERN_SUCCESS!=semaphore_signal(*sem))
-        lose("%s: os_sem_post(%p): %s", what, sem, strerror(errno));
-    FSHOW((stderr, "%s: os_sem_post(%p) ok\n", what, sem));
-}
-
-static inline void
-os_sem_destroy(os_sem_t *sem)
-{
-    if (-1==semaphore_destroy(current_mach_task, *sem))
-        lose("os_sem_destroy(%p): %s", sem, strerror(errno));
-}
-
-# endif
-
-/* Only access thread state with blockables blocked. */
-static inline lispobj
-thread_state(struct thread *thread)
-{
-    lispobj state;
-    sigset_t old;
-    block_blockable_signals(NULL, &old);
-    os_sem_wait(thread->state_sem, "thread_state");
-    state = thread->state;
-    os_sem_post(thread->state_sem, "thread_state");
-    thread_sigmask(SIG_SETMASK, &old, NULL);
-    return state;
-}
-
-static inline void
-set_thread_state(struct thread *thread, lispobj state)
-{
-    int i, waitcount = 0;
-    sigset_t old;
-    block_blockable_signals(NULL, &old);
-    os_sem_wait(thread->state_sem, "set_thread_state");
-    if (thread->state != state) {
-        if ((STATE_STOPPED==state) ||
-            (STATE_DEAD==state)) {
-            waitcount = thread->state_not_running_waitcount;
-            thread->state_not_running_waitcount = 0;
-            for (i=0; i<waitcount; i++)
-                os_sem_post(thread->state_not_running_sem, "set_thread_state (not running)");
-        }
-        if ((STATE_RUNNING==state) ||
-            (STATE_DEAD==state)) {
-            waitcount = thread->state_not_stopped_waitcount;
-            thread->state_not_stopped_waitcount = 0;
-            for (i=0; i<waitcount; i++)
-                os_sem_post(thread->state_not_stopped_sem, "set_thread_state (not stopped)");
-        }
-        thread->state = state;
-    }
-    os_sem_post(thread->state_sem, "set_thread_state");
-    thread_sigmask(SIG_SETMASK, &old, NULL);
-}
-
-static inline void
-wait_for_thread_state_change(struct thread *thread, lispobj state)
-{
-    sigset_t old;
-    os_sem_t *wait_sem;
-    block_blockable_signals(NULL, &old);
-  start:
-    os_sem_wait(thread->state_sem, "wait_for_thread_state_change");
-    if (thread->state == state) {
-        switch (state) {
-        case STATE_RUNNING:
-            wait_sem = thread->state_not_running_sem;
-            thread->state_not_running_waitcount++;
-            break;
-        case STATE_STOPPED:
-            wait_sem = thread->state_not_stopped_sem;
-            thread->state_not_stopped_waitcount++;
-            break;
-        default:
-            lose("Invalid state in wait_for_thread_state_change: "OBJ_FMTX"\n", state);
-        }
-    } else {
-        wait_sem = NULL;
-    }
-    os_sem_post(thread->state_sem, "wait_for_thread_state_change");
-    if (wait_sem) {
-        os_sem_wait(wait_sem, "wait_for_thread_state_change");
-        goto start;
-    }
-    thread_sigmask(SIG_SETMASK, &old, NULL);
-}
-
+lispobj thread_state(struct thread *thread);
+void set_thread_state(struct thread *thread, lispobj state);
+void wait_for_thread_state_change(struct thread *thread, lispobj state);
 extern pthread_key_t lisp_thread;
 #endif