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Clean up some sleep code

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Justine Tunney 2022-10-08 02:40:44 -07:00
parent 9849b4c7ba
commit 672ccda37c
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35 changed files with 310 additions and 598 deletions
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61
third_party/nsync/array.internal.h vendored Executable file
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#ifndef NSYNC_ARRAY_H_
#define NSYNC_ARRAY_H_
/* clang-format off */
/* Return the number of elements in a C array a.
A constant expression if a is a constant expression. */
#define NELEM(a) ((int) (sizeof (a) / sizeof (a[0])))
/* A dynamic array */
/* internal routines */
void a_ensure_ (void *v, int delta, int sz);
/* The following struct prefixes all array values. */
struct a_hdr_ {
int len_; /* The number of elements considererf to be part of the array. */
int max_; /* abs(max_) is the number of elements that have been set aside
to store elements of the array. If max_ < 0, the space
has been allocated statically. If max_ > 0, the space
has been allocated dynamically. */
};
/* A type declaration for an array of "type". Example: typedef A_TYPE (int) array_of_int; */
#define A_TYPE(type) struct { struct a_hdr_ h_; type *a_; }
/* The empty array initializer. Empty arrays can also be initialized by zeroing. */
#define A_EMPTY { { 0, 0 }, NULL }
/* A static initializer using the contents of C array "data".
Example:
static int some_ints[] = { 7, 11, 13 };
static array_of_int x = A_INIT (some_ints); */
#define A_INIT(data) { { NELEM (data), -NELEM (data) }, data }
/* Element i of the array *a (l-value or r-value) */
#define A(a,i) ((a)->a_[i])
/* Append an entry to array *a, and yield it as an l-value. */
#define A_PUSH(a) (*(a_ensure_ ((a), 1, sizeof ((a)->a_[0])), &(a)->a_[(a)->h_.len_++]))
/* Return the length of array *a. */
#define A_LEN(a) ((a)->h_.len_)
/* Set the length of array *a to l. Requires that 0 <= l <= A_LEN (a). */
#define A_SET_LEN(a, l) do { if (0 <= (l) && (l) <= (a)->h_.len_) { \
(a)->h_.len_ = (l); } else { \
*(volatile int *)0 = 0; } } while (0)
/* Reduce the length of array *a by n. Requires that 0 <= n <= A_LEN (a). */
#define A_DISCARD(a, n) do { if (0 <= (n) && (n) <= (a)->h_.len_) { \
(a)->h_.len_ -= (n); } else { \
*(volatile int *)0 = 0; } } while (0)
/* Deallocate and disassociate any storage associated with *a, and make *a
empty. */
#define A_FREE(a) do { if ((a)->h_.max_ > 0) { free ((void *) (a)->a_); } \
(a)->a_ = NULL; (a)->h_.max_ = 0; (a)->h_.len_ = 0; \
} while (0)
#endif /*NSYNC_ARRAY_H_*/