Changeset 2289 for trunk/src/emx/include/InnoTekLIBC

Timestamp:

Aug 21, 2005, 12:08:50 AM (20 years ago)

Author:

bird

Message:

o Protect the fork operations by the means of must complete so

signals won't interrupt us till we're finished. This might leave
unkillable processes around if fork goes highwire.

o Better exception logging during fork.
o Use MMX memcpy in fork (if supported).
o The C function libc_Back_processFork() replaces the pure assembly fork().

Location:

trunk/src/emx/include/InnoTekLIBC

Files:

• backend.h (modified) (1 diff, 1 prop)
• fork.h (modified) (4 diffs, 1 prop)

trunk/src/emx/include/InnoTekLIBC/backend.h

@@ -767 +767 @@
 
 /**
+ * Fork a child process pretty much identical to the calling process.
+ * See SuS for full description of what fork() does and doesn't.
+ *
+ * @returns 0 in the child process.
+ * @returns process identifier of the new child in the parent process. (positive, non-zero)
+ * @returns Negative error code (errno.h) on failure.
+ */
+pid_t __libc_Back_processFork(void);
+
+/**
  * Waits/polls for on one or more processes to change it's running status.
  *

trunk/src/emx/include/InnoTekLIBC/fork.h

@@ -34 +34 @@
 
 /** Current fork version. */
-#define __LIBC_FORK_VERSION             0x00010000
+#define __LIBC_FORK_VERSION             0x00020000
+
+/** Current fork module version. */
+#define __LIBC_FORK_MODULE_VERSION      0x00010000
 
 /** Timeout on waiting semaphore in fork operations */
@@ -272 +275 @@
 typedef struct __libc_ForkHandle
 {
-    /** Fork version. */
+    /** Fork version (__LIBC_FORK_VERSION). */
     unsigned                uVersion;
     /** Parent process, i.e. the one which have called fork(). */
@@ -422 +425 @@
      * the front. */
     __LIBC_PFORKCOMPLETIONCALLBACK  papfnCompletionCallbacks;
+    /** Index of the next completion callback for the parent. */
+    volatile unsigned       iCompletionCallbackParent;
+    /** Index of the next completion callback for the child. */
+    volatile unsigned       iCompletionCallbackChild;
 
     /** Pointer to the start of the fork buffer. */
@@ -538 +545 @@
 typedef struct __libc_ForkModule
 {
-    /** Fork version. */
+    /** Fork module version (__LIBC_FORK_MODULE_VERSION). */
     unsigned                    uVersion;
     /** Fork callback function.