diff options
Diffstat (limited to 'html/033address.cc.html')
| -rw-r--r-- | html/033address.cc.html | 15 |
1 files changed, 9 insertions, 6 deletions
diff --git a/html/033address.cc.html b/html/033address.cc.html index cdae9d7c..04791321 100644 --- a/html/033address.cc.html +++ b/html/033address.cc.html @@ -51,16 +51,18 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color <span class="Comment">//:</span> <span class="Comment">//: The notion of 'lookup' isn't an instruction like 'add' or 'subtract'.</span> <span class="Comment">//: Instead it's an operation that can be performed when reading any of the</span> -<span class="Comment">//: ingredients of an instruction, and when writing to any of the products.</span> -<span class="Comment">//: Modern computers provide efficient support for addresses and lookups,</span> -<span class="Comment">//: making this a realistic feature.</span> +<span class="Comment">//: ingredients of an instruction, and when writing to any of the products. To</span> +<span class="Comment">//: write to the payload of an ingredient rather than its value, simply add</span> +<span class="Comment">//: the /lookup property to it. Modern computers provide efficient support for</span> +<span class="Comment">//: addresses and lookups, making this a realistic feature.</span> <span class="Comment">//:</span> <span class="Comment">//: To recap: an address is a bookmark to some potentially large payload, and</span> <span class="Comment">//: you can replace any ingredient or product with a lookup to an address of</span> <span class="Comment">//: the appropriate type. But how do we get addresses to begin with? That</span> <span class="Comment">//: requires a little more explanation. Once we introduce the notion of</span> <span class="Comment">//: bookmarks to data, we have to think about the life cycle of a piece of</span> -<span class="Comment">//: data and its bookmark. Otherwise several bad outcomes can result (and</span> +<span class="Comment">//: data and its bookmarks (because remember, bookmarks can be copied around</span> +<span class="Comment">//: just like anything else). Otherwise several bad outcomes can result (and</span> <span class="Comment">//: indeed *have* resulted in past languages like C):</span> <span class="Comment">//:</span> <span class="Comment">//: a) You can run out of memory if you don't have a way to reclaim</span> @@ -71,8 +73,9 @@ body { font-size: 12pt; font-family: monospace; color: #eeeeee; background-color <span class="Comment">//: problems can be very hard to track down, and they can also be exploited</span> <span class="Comment">//: to break into your computer over the network, etc.</span> <span class="Comment">//:</span> -<span class="Comment">//: To avoid these problems, we introduce a *reference count* or refcount. The</span> -<span class="Comment">//: life cycle of a bit of data accessed through addresses looks like this.</span> +<span class="Comment">//: To avoid these problems, we introduce the notion of a *reference count* or</span> +<span class="Comment">//: refcount. The life cycle of a bit of data accessed through addresses looks</span> +<span class="Comment">//: like this.</span> <span class="Comment">//:</span> <span class="Comment">//: We create space in computer memory for it using the 'new' instruction.</span> <span class="Comment">//: The 'new' instruction takes a type as an ingredient, allocates</span> |