ref: 19b480838af1721b833f6cd7575e994a5d55071d
dir: /sys/src/cmd/cc/compat/
int myaccess(char *f) { return access(f, AEXIST); } int mycreat(char *n, int p) { return create(n, 1, p); } int mywait(int *s) { int p; Waitmsg *w; if((w = wait()) == nil) return -1; else{ p = w->pid; *s = 0; if(w->msg[0]) *s = 1; free(w); return p; } } int mydup(int f1, int f2) { return dup(f1,f2); } int mypipe(int *fd) { return pipe(fd); } int systemtype(int sys) { return sys & Plan9; } int pathchar(void) { return '/'; } char* mygetwd(char *path, int len) { return getwd(path, len); } int myexec(char *path, char *argv[]) { return exec(path, argv); } int myfork(void) { return fork(); } /* * real allocs */ extern char end[]; static char* hunk = end; static long nhunk; static uintptr thunk; static void gethunk(void) { long nh; if(thunk < NHUNK) nh = NHUNK; else if(thunk < 1000*NHUNK) nh = thunk; else nh = 1000*NHUNK; if(nhunk < 0) nhunk = 0; nhunk += nh; thunk += nh; if(brk(hunk+nhunk) < 0) sysfatal("out of memory"); } void* alloc(long n) { void *p; while((uintptr)hunk & 7) { hunk++; nhunk--; } while(nhunk < n) gethunk(); p = hunk; nhunk -= n; hunk += n; return p; } void* allocn(void *p, long on, long n) { void *q; q = (uchar*)p + on; if(q != hunk || nhunk < n) { while(nhunk < on+n) gethunk(); memmove(hunk, p, on); p = hunk; hunk += on; nhunk -= on; } hunk += n; nhunk -= n; return p; } /* * fake mallocs */ void* malloc(ulong n) { return alloc(n); } void* calloc(ulong m, ulong n) { return alloc(m*n); } void* realloc(void *o, ulong n) { ulong m; void *a; if(n == 0) return nil; if(o == nil) return alloc(n); a = alloc(n); m = (char*)a - (char*)o; if(m < n) n = m; memmove(a, o, n); return a; } void free(void*) { } /* needed when profiling */ void* mallocz(ulong size, int) { return alloc(size); } void setmalloctag(void*, uintptr) { } void setrealloctag(void*, uintptr) { }