+++ /dev/null
-#include <stdio.h>
-#include <string.h>
-#include "config.h"
-
-/**
- * alloc - memory allocator routines
- *
- * The alloc module implements a simple allocator which you can use to
- * dynamically allocate space within a region of memory. This can be useful
- * for suballocations within a given region, or a memory-mapped file.
- *
- * All metadata is kept within the memory handed to the allocator: you only
- * need hand the pointer and the size of the memory to each call.
- *
- * The region contents is always in offsets, so it can be mapped in different
- * places, but is not endian-safe.
- *
- * Example:
- * #include <sys/mman.h>
- * #include <unistd.h>
- * #include <sys/types.h>
- * #include <err.h>
- * #include "alloc/alloc.h"
- *
- * static void usage(const char *name)
- * {
- * errx(1, "Usage: %s --create <mapfile>\n"
- * " %s --check <mapfile>\n"
- * " %s --alloc <mapfile>\n"
- * " %s --free=<offset> <mapfile>\n", name, name, name);
- * }
- *
- * // Create a memory mapped file, and allocate from within it
- * int main(int argc, char *argv[])
- * {
- * void *a, *p;
- * int fd;
- * enum { CREATE, CHECK, ALLOC, FREE } cmd;
- *
- * if (argc != 3)
- * usage(argv[0]);
- *
- * if (strcmp(argv[1], "--create") == 0)
- * cmd = CREATE;
- * else if (strcmp(argv[1], "--check") == 0)
- * cmd = CHECK;
- * else if (strcmp(argv[1], "--alloc") == 0)
- * cmd = ALLOC;
- * else if (strncmp(argv[1], "--free=", strlen("--free=")) == 0)
- * cmd = FREE;
- * else
- * usage(argv[0]);
- *
- * if (cmd == CREATE) {
- * fd = open(argv[2], O_RDWR|O_CREAT|O_EXCL, 0600);
- * if (fd < 0)
- * err(1, "Could not create %s", argv[2]);
- * if (ftruncate(fd, 1048576) != 0)
- * err(1, "Could not set length on %s", argv[2]);
- * } else {
- * fd = open(argv[2], O_RDWR);
- * if (fd < 0)
- * err(1, "Could not open %s", argv[2]);
- * }
- *
- * a = mmap(NULL, 1048576, PROT_READ|PROT_WRITE, MAP_SHARED, fd,0);
- * if (a == MAP_FAILED)
- * err(1, "Could not map %s", argv[2]);
- *
- * switch (cmd) {
- * case CREATE:
- * alloc_init(a, 1048576);
- * break;
- * case CHECK:
- * if (!alloc_check(a, 1048576))
- * err(1, "Region is corrupt");
- * break;
- * case ALLOC:
- * p = alloc_get(a, 1048576, 1024, 16);
- * if (!p)
- * errx(1, "Could not allocate");
- * printf("%zu\n", (char *)p - (char *)a);
- * break;
- * case FREE:
- * p = (char *)a + atol(argv[1] + strlen("--free="));
- * alloc_free(a, 1048576, p);
- * break;
- * }
- * return 0;
- * }
- */
-int main(int argc, char *argv[])
-{
- if (argc != 2)
- return 1;
-
- if (strcmp(argv[1], "depends") == 0) {
- printf("build_assert\n");
- return 0;
- }
-
- return 1;
-}