New inproc transport.

Lots of supporting changes.

1 files changed, 142 insertions, 0 deletions

diff --git a/src/core/platform.h b/src/core/platform.h
new file mode 100644
index 00000000..ea8f1378
--- /dev/null
+++ b/src/core/platform.h
@@ -0,0 +1,142 @@
+/*
+ * Copyright 2016 Garrett D'Amore <garrett@damore.org>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom
+ * the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+#ifndef CORE_PLATFORM_H
+#define CORE_PLATFORM_H
+
+/*
+ * We require some standard C header files.  The only one of these that might
+ * be problematic is <stdint.h>, which is required for C99.  Older versions
+ * of the Windows compilers might not have this.  However, latest versions of
+ * MS Studio have a functional <stdint.h>.  If this impacts you, just upgrade
+ * your tool chain.
+ */
+#include <stdarg.h>
+#include <stddef.h>
+#include <stdint.h>
+
+/*
+ * These are the APIs that a platform must implement to support nng.
+ */
+
+/*
+ * nni_abort crashes the system; it should do whatever is appropriate
+ * for abnormal programs on the platform, such as calling abort().
+ */
+void nni_abort(void);
+
+/*
+ * nni_vnsprintf is exactly like its POSIX counterpart.
+ * Some platforms (Windows!) need a special version of this.
+ */
+void nni_vsnprintf(char *, size_t, const char *, va_list);
+
+/*
+ * nni_debug_output is used to emit debug messages.  Typically this is used
+ * during core debugging, or to emit panic messages.  Message content will
+ * not contain newlines, but the output will add them.
+ */
+void nni_debug_out(const char *);
+
+/*
+ * nni_set_debug_output is used to redirect debug output; for example an
+ * application could replace the default output routine with one that sends
+ * it's output to syslog.  If NULL is specified, then a default handler
+ * used instead.  The handler should add any newlines to the output as
+ * required.  The default handler writes to standard error.
+ */
+void nni_set_debug_out(void (*)(const char *));
+
+/*
+ * nni_alloc allocates memory.  In most cases this can just be malloc().
+ * However, you may provide a different allocator, for example it is
+ * possible to use a slab allocator or somesuch.  It is permissible for this
+ * to return NULL if memory cannot be allocated.
+ */
+void *nni_alloc(size_t);
+
+/*
+ * nni_free frees memory allocated with nni_alloc. It takes a size because
+ * some allocators do not track size, or can operate more efficiently if
+ * the size is provided with the free call.  Examples of this are slab
+ * allocators like this found in Solaris/illumos (see libumem or kmem).
+ * This routine does nothing if supplied with a NULL pointer and zero size.
+ * Most implementations can just call free() here.
+ */
+void nni_free(void *, size_t);
+
+typedef struct nni_mutex *nni_mutex_t;
+typedef struct nni_cond *nni_cond_t;
+
+/*
+ * Mutex handling.
+ */
+int nni_mutex_create(nni_mutex_t *);
+void nni_mutex_destroy(nni_mutex_t);
+void nni_mutex_enter(nni_mutex_t);
+void nni_mutex_exit(nni_mutex_t);
+int nni_mutex_tryenter(nni_mutex_t);
+int nni_cond_create(nni_cond_t *, nni_mutex_t);
+void nni_cond_destroy(nni_cond_t);
+
+/*
+ * nni_cond_broadcast wakes all waiters on the condition.  This should be
+ * called with the lock held.
+ */
+void nni_cond_broadcast(nni_cond_t);
+
+/*
+ * nni_cond_signal wakes a signal waiter.
+ */
+void nni_cond_signal(nni_cond_t);
+
+/*
+ * nni_condwait waits for a wake up on the condition variable.  The
+ * associated lock is atomically released and reacquired upon wake up.
+ * Callers can be spuriously woken.  The associated lock must be held.
+ */
+void nni_cond_wait(nni_cond_t);
+
+/*
+ * nni_cond_timedwait waits for a wakeup on the condition variable, just
+ * as with nni_condwait, but it will also wake after the given number of
+ * microseconds has passed.  (This is a relative timed wait.)  Early
+ * wakeups are permitted, and the caller must take care to double check any
+ * conditions.  The return value is 0 on success, or an error code, which
+ * can be NNG_ETIMEDOUT.  Note that it is permissible to wait for longer
+ * than the timeout based on the resolution of your system clock.
+ */
+int nni_cond_timedwait(nni_cond_t, uint64_t);
+
+/*
+ * nn_clock returns a number of microseconds since some arbitrary time
+ * in the past.  The values returned by nni_clock may be used with
+ * nni_cond_timedwait.
+ */
+uint64_t nni_clock(void);
+
+/*
+ * nni_usleep sleeps for the specified number of microseconds (at least).
+ */
+void nni_usleep(uint64_t);
+
+#endif /* CORE_PLATFORM_H */