Initial commit

- create subsystem system using clone syscall, shared memory, shared
  file descriptors
- printk-like logging facility (TODO: console loglevel)
- initcall system (like linux kernel)

TODO: determine license
factors: linker.ld, linux kernel licensing (some ideas are more
  liberally taken rather than paraphrased)

5 files changed, 81 insertions, 0 deletions

diff --git a/include/config.h b/include/config.h
new file mode 100644
index 0000000..4254edc
--- /dev/null
+++ b/include/config.h
@@ -0,0 +1,4 @@
+#define VERSION "0.0.1"
+#define NAME_SHORTHAND "TCDBF"
+#define NAME "turret.'s C Discord Bot Framework"
+
diff --git a/include/init.h b/include/init.h
new file mode 100644
index 0000000..c9d8cba
--- /dev/null
+++ b/include/init.h
@@ -0,0 +1,23 @@
+#ifndef __INIT_H
+#define __INIT_H
+
+typedef int (*initcall_t)(void);
+typedef initcall_t initcall_entry_t;
+
+#define __define_initcall(fn, id) \
+    static initcall_t __initcall_##fn##id \
+    __attribute__((used)) \
+    __attribute__((section(".initcall" #id ".init"))) = fn
+
+#define l1_initcall(fn) __define_initcall(fn, 1)
+#define l2_initcall(fn) __define_initcall(fn, 2)
+#define l3_initcall(fn) __define_initcall(fn, 3)
+#define l4_initcall(fn) __define_initcall(fn, 4)
+#define l5_initcall(fn) __define_initcall(fn, 5)
+
+static inline initcall_t initcall_from_entry(initcall_entry_t *entry)
+{
+    return *entry;
+}
+
+#endif
diff --git a/include/log.h b/include/log.h
new file mode 100644
index 0000000..52d45ff
--- /dev/null
+++ b/include/log.h
@@ -0,0 +1,42 @@
+
+#define LOG_SOH "\001"
+#define LOG_SOH_ASCII '\001'
+
+#define LOG_EMERG LOG_SOH "0"
+#define LOG_ALERT LOG_SOH "1"
+#define LOG_CRIT LOG_SOH "2"
+#define LOG_ERR LOG_SOH "3"
+#define LOG_WARNING LOG_SOH "4"
+#define LOG_NOTICE LOG_SOH "5"
+#define LOG_INFO LOG_SOH "6"
+#define LOG_DEBUG LOG_SOH "7"
+
+#define LOG_DEFAULT ""
+
+int print(const char *fmt, ...);
+
+#define ANSI_CSI "\x1b["
+
+#define ANSI_BOLD ANSI_CSI "1m"
+#define ANSI_ITALIC ANSI_CSI "3m"
+#define ANSI_BLINK ANSI_CSI "5m"
+#define ANSI_REVERSE ANSI_CSI "7m"
+#define ANSI_RESET ANSI_CSI "0m"
+
+#define ANSI_BLACK ANSI_CSI "30m"
+#define ANSI_RED ANSI_CSI "31m"
+#define ANSI_GREEN ANSI_CSI "32m"
+#define ANSI_YELLOW ANSI_CSI "33m"
+#define ANSI_BLUE ANSI_CSI "34m"
+#define ANSI_MAGENTA ANSI_CSI "35m"
+#define ANSI_CYAN ANSI_CSI "36m"
+#define ANSI_WHITE ANSI_CSI "37m"
+
+#define ANSI_BRIGHT_BLACK ANSI_CSI "90m"
+#define ANSI_BRIGHT_RED ANSI_CSI "91m"
+#define ANSI_BRIGHT_GREEN ANSI_CSI "92m"
+#define ANSI_BRIGHT_YELLOW ANSI_CSI "93m"
+#define ANSI_BRIGHT_BLUE ANSI_CSI "94m"
+#define ANSI_BRIGHT_MAGENTA ANSI_CSI "95m"
+#define ANSI_BRIGHT_CYAN ANSI_CSI "96m"
+#define ANSI_BRIGHT_WHITE ANSI_CSI "97m"
diff --git a/include/subsys.h b/include/subsys.h
new file mode 100644
index 0000000..1515293
--- /dev/null
+++ b/include/subsys.h
@@ -0,0 +1,7 @@
+#ifndef __SUBSYS_H
+#define __SUBSYS_H
+
+int __impl_start_subsystem(char *name, int (*fn)(void));
+#define start_subsystem(fn) __impl_start_subsystem(#fn, fn)
+
+#endif
diff --git a/include/util.h b/include/util.h
new file mode 100644
index 0000000..97435be
--- /dev/null
+++ b/include/util.h
@@ -0,0 +1,5 @@
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+void die(const char *fmt, ...);
+
+#define writeputs(str) write(STDOUT_FILENO, str, strlen(str));