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api(ffi): store reference pointer to Context in dc_chat_t

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This avoids problems if dc_context_t
is unreferenced, invalidating dc_chat_t
that was derived from it.
This commit is contained in:
link2xt
2025-03-11 20:38:49 +00:00
committed by l
parent b5de5d0dc0
commit b5acbaa31c
1 changed files with 8 additions and 9 deletions
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17
deltachat-ffi/src/lib.rs
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@@ -1658,6 +1658,7 @@ pub unsafe extern "C" fn dc_get_chat(context: *mut dc_context_t, chat_id: u32) -
return ptr::null_mut();
}
let ctx = &*context;
let context: Context = ctx.clone();
block_on(async move {
match chat::Chat::load_from_db(ctx, ChatId::new(chat_id)).await {
@@ -2982,7 +2983,7 @@ pub unsafe extern "C" fn dc_chatlist_get_context(
/// context, but the Rust API does not, so the FFI layer needs to glue
/// these together.
pub struct ChatWrapper {
context: *const dc_context_t,
context: Context,
chat: chat::Chat,
}
@@ -3049,14 +3050,13 @@ pub unsafe extern "C" fn dc_chat_get_profile_image(chat: *mut dc_chat_t) -> *mut
return ptr::null_mut(); // NULL explicitly defined as "no image"
}
let ffi_chat = &*chat;
let ctx = &*ffi_chat.context;
block_on(async move {
match ffi_chat.chat.get_profile_image(ctx).await {
match ffi_chat.chat.get_profile_image(&ffi_chat.context).await {
Ok(Some(p)) => p.to_string_lossy().strdup(),
Ok(None) => ptr::null_mut(),
Err(err) => {
error!(ctx, "failed to get profile image: {err:#}");
error!(ffi_chat.context, "failed to get profile image: {err:#}");
ptr::null_mut()
}
}
@@ -3070,9 +3070,9 @@ pub unsafe extern "C" fn dc_chat_get_color(chat: *mut dc_chat_t) -> u32 {
return 0;
}
let ffi_chat = &*chat;
let ctx = &*ffi_chat.context;
block_on(ffi_chat.chat.get_color(ctx)).unwrap_or_log_default(ctx, "Failed get_color")
block_on(ffi_chat.chat.get_color(&ffi_chat.context))
.unwrap_or_log_default(&ffi_chat.context, "Failed get_color")
}
#[no_mangle]
@@ -3136,10 +3136,9 @@ pub unsafe extern "C" fn dc_chat_can_send(chat: *mut dc_chat_t) -> libc::c_int {
return 0;
}
let ffi_chat = &*chat;
let ctx = &*ffi_chat.context;
block_on(ffi_chat.chat.can_send(ctx))
block_on(ffi_chat.chat.can_send(&ffi_chat.context))
.context("can_send failed")
.log_err(ctx)
.log_err(&ffi_chat.context)
.unwrap_or_default() as libc::c_int
}