`JS_NewClassID(rt, &class_id)` where `class_id` is a global variable
is unsafe when called from multiple threads but that is exactly what
quickjs-libc.c did.
Add a new JS_AddRuntimeFinalizer function that lets quickjs-libc
store the class ids in JSRuntimeState and defer freeing the memory
until the runtime is destroyed. Necessary because object finalizers
such as js_std_file_finalizer need to know the class id and run after
js_std_free_handlers runs.
Fixes: https://github.com/quickjs-ng/quickjs/issues/577
Rather than having the user take care of JSMallocState, take care of the
bookkeeping internally (and make JSMallocState non-public since it's no
longer necessary) and keep the allocation functions to the bare minimum.
This has the advantage that using a different allocator is just a few
lines of code, and there is no need to copy the default implementation
just to moficy the call to the allocation function.
Fixes: https://github.com/quickjs-ng/quickjs/issues/285
Analogously to JS_WriteObject2, it allows the user to get a tab with all
the SAB objects that were read.
This can help adjust reference counts in a scenario where a SAB that was
written increased it and it's necessary to decrease it upon reading it.
This avoids the two GCC -Wconversion warnings in this public header, which is useful when using extensive error reporting from the compiler, and treating warnings as errors.
String values are allocated as temporary or final results. This commit
attempts to improve the consistency and performance of this step.
- define `JS_NewString` as an inline function to allow simple expansion
of `strlen()` for string literals
- document string contents constraints regarding UTF-8 encoding.
- rename `js_new_string8` as `js_new_string8_len`. takes `const char *`.
- new inline function `js_new_string8` takes `const char *`, computes
string length with `strlen` and calls `js_new_string8_len`. No overhead
for string literals
- rename `js_new_string16` to `js_new_string16_len`
- use internal string allocation functions where appropriate, remove overhead
- allocate extra byte for null terminator in source code string
- `-s` strips the source code
- `-ss` strips source and line/column numbers information
- `qjsc repl.js` generates an object size of **105726** bytes
- `qjsc -s repl.js` generates an object size of **20853** bytes
- `qjsc -ss repl.js` generates an object size of only **16147** bytes
- compile repl.js with `-ss`
- bump byte code version to 12
* Expose public equality comparison and sameness public API.
- add `JS_IsEqual` (operator `==`), returns an `int`: `-1` if an exception was thrown
- add `JS_IsStrictEqual` (operator `===`) always succeeds, returns a `JS_BOOL`
- add `JS_IsSameValue` always succeeds, returns a `JS_BOOL`
- add `JS_IsSameValueZero` always succeeds, returns a `JS_BOOL`
- DUMP_XXX defined as nothing or 0 produces unconditional output
- DUMP_XXX defined as a bitmask produces conditional output based
on command line option -d<bitmask>
- add `JS_SetDumpFlags()` to select active dump options
- accept -d[<hex mask>] and --dump[=<hex mask>] to specify active
dump options, generalize command line option handling
- improve DUMP_READ_OBJECT output, fix indentation issue
It was a wrapper around gcc's __builtin_expect macro but it was only
used in three places and not in a way that suggests it really helps
branch prediction on modern (or even not so modern) CPUs.
Refs: https://github.com/quickjs-ng/quickjs/issues/369
